diff --git a/xml/test-2-enter/021-instance_atributes-rsc-nonbijective.ref b/xml/test-2-enter/021-instance_atributes-rsc-nonbijective.ref
new file mode 100644
index 0000000000..3a94fb075d
--- /dev/null
+++ b/xml/test-2-enter/021-instance_atributes-rsc-nonbijective.ref
@@ -0,0 +1,40 @@
+<cib validate-with="pacemaker-2.0" admin_epoch="0" epoch="0" num_updates="0">
+  <configuration>
+    <crm_config/>
+    <nodes>
+
+      <node id="virt-063" uname="virt-063"/>
+      <node id="virt-064" uname="virt-064"/>
+      <node id="virt-069" uname="virt-069"/>
+
+    </nodes>
+    <resources>
+
+      <primitive id="mySmartFuse" class="ocf" provider="experiment" type="SmartFuse">
+        <operations>
+          <op id="mySmartFuse-start" name="start" interval="0" timeout="40s"/>
+          <op id="mySmartFuse-monitor-inputpower" name="monitor" interval="30s">
+            <instance_attributes id="mySmartFuse-inputpower-instanceparams">
+              <nvpair id="mySmartFuse-inputpower-requires" name="requires" value="inputpower"/>
+            </instance_attributes>
+          </op>
+          <op id="mySmartFuse-monitor-outputpower" name="monitor" interval="2s">
+            <instance_attributes id="mySmartFuse-outputpower-instanceparams">
+              <nvpair id="mySmartFuse-outputpower-requires" name="requires" value="outputpower"/>
+            </instance_attributes>
+          </op>
+        </operations>
+        <instance_attributes id="mySmartFuse-params">
+          <nvpair id="mySmartFuse-params-ip" name="ip" value="192.0.2.10"/>
+        </instance_attributes>
+	<!-- a bit hairy but valid -->
+        <instance_attributes id="_cibtr-2_mySmartFuse-outputpower-instanceparams">
+              <nvpair id="__cibtr-2_mySmartFuse-outputpower-instanceparams__mySmartFuse-outputpower-requires" name="requires" value="outputpower"/>
+            </instance_attributes>
+      </primitive>
+
+    </resources>
+    <constraints/>
+  </configuration>
+  <status/>
+</cib>
diff --git a/xml/test-2-enter/021-instance_atributes-rsc-nonbijective.ref.err b/xml/test-2-enter/021-instance_atributes-rsc-nonbijective.ref.err
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/xml/test-2-enter/021-instance_atributes-rsc-nonbijective.xml b/xml/test-2-enter/021-instance_atributes-rsc-nonbijective.xml
new file mode 100644
index 0000000000..7a12ebe403
--- /dev/null
+++ b/xml/test-2-enter/021-instance_atributes-rsc-nonbijective.xml
@@ -0,0 +1,38 @@
+<cib validate-with="pacemaker-2.0" admin_epoch="0" epoch="0" num_updates="0">
+  <configuration>
+    <crm_config/>
+    <nodes>
+
+      <node id="virt-063" uname="virt-063"/>
+      <node id="virt-064" uname="virt-064"/>
+      <node id="virt-069" uname="virt-069"/>
+
+    </nodes>
+    <resources>
+
+      <primitive id="mySmartFuse" class="ocf" provider="experiment" type="SmartFuse">
+        <operations>
+          <op id="mySmartFuse-start" name="start" interval="0" timeout="40s"/>
+          <op id="mySmartFuse-monitor-inputpower" name="monitor" interval="30s">
+            <instance_attributes id="mySmartFuse-inputpower-instanceparams">
+              <nvpair id="mySmartFuse-inputpower-requires" name="requires" value="inputpower"/>
+            </instance_attributes>
+          </op>
+          <op id="mySmartFuse-monitor-outputpower" name="monitor" interval="2s">
+            <instance_attributes id="mySmartFuse-outputpower-instanceparams">
+              <nvpair id="mySmartFuse-outputpower-requires" name="requires" value="outputpower"/>
+            </instance_attributes>
+          </op>
+        </operations>
+        <instance_attributes id="mySmartFuse-params">
+          <nvpair id="mySmartFuse-params-ip" name="ip" value="192.0.2.10"/>
+        </instance_attributes>
+	<!-- a bit hairy but valid -->
+        <instance_attributes id-ref="mySmartFuse-outputpower-instanceparams"/>
+      </primitive>
+
+    </resources>
+    <constraints/>
+  </configuration>
+  <status/>
+</cib>
diff --git a/xml/test-2-leave/021-instance_atributes-rsc-nonbijective.ref b/xml/test-2-leave/021-instance_atributes-rsc-nonbijective.ref
new file mode 100644
index 0000000000..93ac06f674
--- /dev/null
+++ b/xml/test-2-leave/021-instance_atributes-rsc-nonbijective.ref
@@ -0,0 +1,32 @@
+<cib validate-with="pacemaker-3.0" admin_epoch="0" epoch="0" num_updates="0">
+  <configuration>
+    <crm_config/>
+    <nodes>
+
+      <node id="virt-063" uname="virt-063"/>
+      <node id="virt-064" uname="virt-064"/>
+      <node id="virt-069" uname="virt-069"/>
+
+    </nodes>
+    <resources>
+
+      <primitive id="mySmartFuse" class="ocf" provider="experiment" type="SmartFuse">
+        <operations>
+          <op id="mySmartFuse-start" name="start" interval="0" timeout="40s"/>
+          <op id="mySmartFuse-monitor-inputpower" name="monitor" interval="30s"/>
+          <op id="mySmartFuse-monitor-outputpower" name="monitor" interval="2s"/>
+        </operations>
+        <instance_attributes id="mySmartFuse-params">
+          <nvpair id="mySmartFuse-params-ip" name="ip" value="192.0.2.10"/>
+        </instance_attributes>
+	<!-- a bit hairy but valid -->
+        <instance_attributes id="_cibtr-2_mySmartFuse-outputpower-instanceparams">
+          <nvpair id="__cibtr-2_mySmartFuse-outputpower-instanceparams__mySmartFuse-outputpower-requires" name="requires" value="outputpower"/>
+        </instance_attributes>
+      </primitive>
+
+    </resources>
+    <constraints/>
+  </configuration>
+  <status/>
+</cib>
diff --git a/xml/test-2-leave/021-instance_atributes-rsc-nonbijective.ref.err b/xml/test-2-leave/021-instance_atributes-rsc-nonbijective.ref.err
new file mode 100644
index 0000000000..d5dc0e6fef
--- /dev/null
+++ b/xml/test-2-leave/021-instance_atributes-rsc-nonbijective.ref.err
@@ -0,0 +1 @@
+instance_attributes: original element pointed to with @id-ref (mySmartFuse-outputpower-instanceparams) disappeared during upgrade
diff --git a/xml/test-2-leave/021-instance_atributes-rsc-nonbijective.xml b/xml/test-2-leave/021-instance_atributes-rsc-nonbijective.xml
new file mode 100644
index 0000000000..93ac06f674
--- /dev/null
+++ b/xml/test-2-leave/021-instance_atributes-rsc-nonbijective.xml
@@ -0,0 +1,32 @@
+<cib validate-with="pacemaker-3.0" admin_epoch="0" epoch="0" num_updates="0">
+  <configuration>
+    <crm_config/>
+    <nodes>
+
+      <node id="virt-063" uname="virt-063"/>
+      <node id="virt-064" uname="virt-064"/>
+      <node id="virt-069" uname="virt-069"/>
+
+    </nodes>
+    <resources>
+
+      <primitive id="mySmartFuse" class="ocf" provider="experiment" type="SmartFuse">
+        <operations>
+          <op id="mySmartFuse-start" name="start" interval="0" timeout="40s"/>
+          <op id="mySmartFuse-monitor-inputpower" name="monitor" interval="30s"/>
+          <op id="mySmartFuse-monitor-outputpower" name="monitor" interval="2s"/>
+        </operations>
+        <instance_attributes id="mySmartFuse-params">
+          <nvpair id="mySmartFuse-params-ip" name="ip" value="192.0.2.10"/>
+        </instance_attributes>
+	<!-- a bit hairy but valid -->
+        <instance_attributes id="_cibtr-2_mySmartFuse-outputpower-instanceparams">
+          <nvpair id="__cibtr-2_mySmartFuse-outputpower-instanceparams__mySmartFuse-outputpower-requires" name="requires" value="outputpower"/>
+        </instance_attributes>
+      </primitive>
+
+    </resources>
+    <constraints/>
+  </configuration>
+  <status/>
+</cib>
diff --git a/xml/upgrade-2.10.xsl b/xml/upgrade-2.10.xsl
index 321b3c22ba..dec4e7b88b 100644
--- a/xml/upgrade-2.10.xsl
+++ b/xml/upgrade-2.10.xsl
@@ -1,2532 +1,2522 @@
 <!--
  Copyright 2018 Red Hat, Inc.
  Author: Jan Pokorny <jpokorny@redhat.com>
  Part of pacemaker project
  SPDX-License-Identifier: GPL-2.0-or-later
  -->
+
+<!--
+ Not compatible with @id-ref occurrences!  Normalize generic 2.X-compatible
+ instances with upgrade-2.10-enter.xsl (optionally denormalize back akin
+ to the original with upgrade-2.10-leave.xsl once the upgrade is finished).
+-->
+
 <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                 xmlns:cibtr="http://clusterlabs.org/ns/pacemaker/cibtr-2"
                 exclude-result-prefixes="cibtr">
 <xsl:output method="xml" encoding="UTF-8" indent="yes" omit-xml-declaration="yes"/>
 
 <xsl:param name="cibtr:cib-min-ver" select="'3.0'"/>
 
 <!--
 
  HELPER DEFINITIONS
 
  -->
 
 <cibtr:map>
 
   <!--
    Target tag:     cluster_property_set
    Object:         ./nvpair/@name
    Selector ctxt:  ./nvpair/@value
    Move ctxt:      op_defaults ~ /cib/configuration/op_defaults
                    rsc_defaults ~ /cib/configuration/rsc_defaults
    Related commit: c1c66fe13
                    +
                    7a9891f29
                    7d0d1b0eb
                    1f643d610
                    73a5d63a8
                    +
                    642a09b22
                    0c03e366d
                    a28a558f9
    -->
   <cibtr:table for="cluster-properties" msg-prefix="Cluster properties"
                where-cases="op_defaults|rsc_defaults">
     <cibtr:replace what="cluster-infrastructure"
                    with=""
                    in-case-of="heartbeat|openais|classic openais|classic openais (with plugin)|cman"
                    msg-extra="corosync (2+) infrastructure can be used instead, though the value is not of significance"/>
 
     <cibtr:replace what="cluster_recheck_interval"
                    with="cluster-recheck-interval"/>
     <cibtr:replace what="dc_deadtime"
                    with="dc-deadtime"/>
 
     <cibtr:replace what="default-action-timeout"
                    with="timeout"
                    where="op_defaults"/>
     <cibtr:replace what="default_action_timeout"
                    with="timeout"
                    where="op_defaults"/>
 
     <cibtr:replace what="default-migration-threshold"
                    with=""
                    msg-extra="migration-threshold in rsc_defaults can be configured instead"/>
     <cibtr:replace what="default_migration_threshold"
                    with=""
                    msg-extra="migration-threshold in rsc_defaults can be configured instead"/>
 
     <cibtr:replace what="default-resource-stickiness"
                    with="resource-stickiness"
                    where="rsc_defaults"/>
     <cibtr:replace what="default_resource_stickiness"
                    with="resource-stickiness"
                    where="rsc_defaults"/>
 
     <cibtr:replace what="default-resource-failure-stickiness"
                    with="migration-threshold"
                    where="rsc_defaults"
                    in-case-of="-INFINITY"
                    redefined-as="1"/>
     <cibtr:replace what="default-resource-failure-stickiness"
                    with=""
                    msg-extra="migration-threshold in rsc_defaults can be configured instead"/>
     <cibtr:replace what="default_resource_failure_stickiness"
                    with="migration-threshold"
                    where="rsc_defaults"
                    in-case-of="-INFINITY"
                    redefined-as="1"/>
     <cibtr:replace what="default_resource_failure_stickiness"
                    with=""
                    msg-extra="migration-threshold in rsc_defaults can be configured instead"/>
 
     <cibtr:replace what="election_timeout"
                    with="election-timeout"/>
     <cibtr:replace what="expected-quorum-votes"
                    with=""
                    msg-extra="corosync (2+) infrastructure tracks quorum on its own"/>
 
     <cibtr:replace what="is-managed-default"
                    with="is-managed"
                    where="rsc_defaults"/>
     <cibtr:replace what="is_managed_default"
                    with="is-managed"
                    where="rsc_defaults"/>
     <cibtr:replace what="no_quorum_policy"
                    with="no-quorum-policy"/>
 
     <cibtr:replace what="notification-agent"
                    with=""
                    msg-extra="standalone alerts can be configured instead"/>
     <cibtr:replace what="notification-recipient"
                    with=""
                    msg-extra="standalone alerts can be configured instead"/>
 
     <cibtr:replace what="remove_after_stop"
                    with="remove-after-stop"/>
     <cibtr:replace what="shutdown_escalation"
                    with="shutdown-escalation"/>
     <cibtr:replace what="startup_fencing"
                    with="startup-fencing"/>
     <cibtr:replace what="stonith_action"
                    with="stonith-action"/>
     <cibtr:replace what="stonith_enabled"
                    with="stonith-enabled"/>
     <cibtr:replace what="stop_orphan_actions"
                    with="stop-orphan-actions"/>
     <cibtr:replace what="stop_orphan_resources"
                    with="stop-orphan-resources"/>
     <cibtr:replace what="symmetric_cluster"
                    with="symmetric-cluster"/>
     <cibtr:replace what="transition_idle_timeout"
                    with="cluster-delay"/>
   </cibtr:table>
 
   <!--
    Target tag:     node
    Object:         ./@*
    Selector ctxt:  ./@*
    Move ctxt:      N/A
    Related commit: 55ab749bf
    -->
   <cibtr:table for="cluster-node" msg-prefix="Cluster node">
     <cibtr:replace what="type"
                    with="type"
                    in-case-of="normal"
                    redefined-as="member"/>
   </cibtr:table>
 
   <!--
    Target tag:     primitive
                    template
    Object:         ./instance_attributes/nvpair/@name
    Selector ctxt:  N/A
    Move ctxt:      N/A
    Related commit: 06d4559cb
                    +
                    6c8e0be20
    -->
   <cibtr:table for="resource-instance-attributes" msg-prefix="Resource instance_attributes">
     <cibtr:replace what="pcmk_arg_map"
                    with=""/>
     <!-- simplified as pcmk_arg_map can encode multiple
          comma-separated pairs (everything would be dropped then,
          except for a single dangling case: "port" coming first) -->
     <cibtr:replace what="pcmk_arg_map"
                    with="pcmk_host_argument"
                    in-case-of-droppable-prefix="port:"/>
 
     <cibtr:replace what="pcmk_list_cmd"
                    with="pcmk_list_action"/>
     <cibtr:replace what="pcmk_monitor_cmd"
                    with="pcmk_monitor_action"/>
     <cibtr:replace what="pcmk_off_cmd"
                    with="pcmk_off_action"/>
     <cibtr:replace what="pcmk_on_cmd"
                    with="pcmk_on_action"/>
     <cibtr:replace what="pcmk_reboot_cmd"
                    with="pcmk_reboot_action"/>
     <cibtr:replace what="pcmk_status_cmd"
                    with="pcmk_status_action"/>
   </cibtr:table>
 
   <!--
    Target tag:     primitive
                    template
    Object:         ./meta_attributes/nvpair/@name
    Selector ctxt:  N/A
    Move ctxt:      N/A
    Related commit: c713bbe39
                    +
                    6052ad6da
    -->
   <cibtr:table for="resource-meta-attributes" msg-prefix="Resource meta_attributes">
     <cibtr:replace what="isolation"
                    with="target-role"
                    redefined-as="Stopped"
                    msg-extra="i.e. resource at hand disabled; isolation wrappers obsoleted with bundle resources"/>
     <cibtr:replace what="isolation-host"
                    with="target-role"
                    redefined-as="Stopped"
                    msg-extra="i.e. resource at hand disabled; isolation wrappers obsoleted with bundle resources"/>
     <cibtr:replace what="isolation-instance"
                    with="target-role"
                    redefined-as="Stopped"
                    msg-extra="i.e. resource at hand disabled; isolation wrappers obsoleted with bundle resources"/>
     <cibtr:replace what="isolation-wrapper"
                    with="target-role"
                    redefined-as="Stopped"
                    msg-extra="i.e. resource at hand disabled; isolation wrappers obsoleted with bundle resources"/>
 
     <cibtr:replace what="resource-failure-stickiness"
                    with="migration-threshold"
                    in-case-of="-INFINITY"
                    redefined-as="1"/>
     <cibtr:replace what="resource-failure-stickiness"
                    with=""
                    msg-extra="migration-threshold can be configured instead"/>
     <cibtr:replace what="resource_failure_stickiness"
                    with="migration-threshold"
                    in-case-of="-INFINITY"
                    redefined-as="1"/>
     <cibtr:replace what="resource_failure_stickiness"
                    with=""
                    msg-extra="migration-threshold can be configured instead"/>
   </cibtr:table>
 
   <!--
    Target tag:     primitive
                    template
    Object:         ./operations/op/@*
                    ./operations/op/meta_attributes/nvpair/@name
                    ./operations/op/instance_attributes/nvpair/@name
    Selector ctxt:  ./operations/op/@name
    Move ctxt:      meta_attributes ~ ./meta_attributes/nvpair
    Related commit: 014a543d5
    -->
   <cibtr:table for="resources-operation" msg-prefix="Resources-operation"
                where-cases="meta_attributes">
     <!-- keep this in sync with resource-operation-instance-attributes table -->
     <cibtr:replace what="requires"
                    with=""
                    msg-extra="only start/promote operation taken into account"/>
     <cibtr:replace what="requires"
                    with="requires"
                    in-case-of="start|promote"
                    where="meta_attributes"/>
   </cibtr:table>
 
   <!--
    Target tag:     primitive
                    template
    Object:         ./operations/op/instance_attributes/nvpair/@name
    Selector ctxt:  ./operations/op/@name
    Move ctxt:      per-resource-meta_attributes ~ ./meta_attributes/nvpair
                    meta_attributes ~ ./operations/op/meta_attributes/nvpair
    Related commit: 023897afc
                    3100c0e8b
    -->
   <cibtr:table for="resource-operation-instance-attributes"
                msg-prefix="Resources-operation instance_attributes"
                where-cases="meta_attributes|per-resource-meta_attributes">
     <!-- this is easier to solve through resources-operation table handling,
          in the inverse mode, but for compatibility purposes, we need to have
          it tracked here, so mark it the same way as if we were moving it over
          to sibling per-op meta_attributes (while in fact we move it up to
          per-resource meta_attributes, as if it was specified in per-op
          meta_attributes already), just use a dedicated "where-case" other
          than "meta_attributes" reserved for proper local move as mentioned;
          otherwise keep it in sync with said table -->
     <cibtr:replace what="requires"
                    with=""
                    msg-extra="only start/promote operation taken into account"/>
     <cibtr:replace what="requires"
                    with="requires"
                    in-case-of="start|promote"
                    where="per-resource-meta_attributes"/>
 
     <!-- these must have been, due to the value sourcing predence arrangement,
          shadowed by immediate op's attributes, so simply preserve their
          non-meta meaning -->
     <!--
     <cibtr:replace what="name"
                    with="name"
                    where="meta_attributes"/>
     <cibtr:replace what="interval"
                    with="interval"
                    where="meta_attributes"/>
     -->
 
     <cibtr:replace what="interval-origin"
                    with="interval-origin"
                    where="meta_attributes"/>
     <cibtr:replace what="start-delay"
                    with="start-delay"
                    where="meta_attributes"/>
 
     <cibtr:replace what="enabled"
                    with="enabled"
                    where="meta_attributes"/>
     <cibtr:replace what="on-fail"
                    with="on-fail"
                    where="meta_attributes"/>
     <cibtr:replace what="record-pending"
                    with="record-pending"
                    where="meta_attributes"/>
     <cibtr:replace what="role"
                    with="role"
                    where="meta_attributes"/>
     <cibtr:replace what="timeout"
                    with="timeout"
                    where="meta_attributes"/>
   </cibtr:table>
 
   <!--
    Target tag:     rsc_colocation
    Object:         ./@*
    Selector ctxt:  N/A
    Move ctxt:      N/A
    Related commit: 96d7ffedf
    -->
   <cibtr:table for="constraints-colocation" msg-prefix="Constraints-colocation">
     <cibtr:replace what="score-attribute"
                    with=""
                    msg-extra="was actually never in effect"/>
     <cibtr:replace what="score-attribute-mangle"
                    with=""
                    msg-extra="was actually never in effect"/>
   </cibtr:table>
 
 </cibtr:map>
 
 <xsl:variable name="cibtr:MapClusterProperties"
               select="document('')/xsl:stylesheet
                         /cibtr:map/cibtr:table[
                           @for = 'cluster-properties'
                         ]"/>
 
 <xsl:variable name="cibtr:MapClusterNode"
               select="document('')/xsl:stylesheet
                         /cibtr:map/cibtr:table[
                           @for = 'cluster-node'
                         ]"/>
 
 <xsl:variable name="cibtr:MapResourceInstanceAttributes"
               select="document('')/xsl:stylesheet
                         /cibtr:map/cibtr:table[
                           @for = 'resource-instance-attributes'
                         ]"/>
 
 <xsl:variable name="cibtr:MapResourceMetaAttributes"
               select="document('')/xsl:stylesheet
                         /cibtr:map/cibtr:table[
                           @for = 'resource-meta-attributes'
                         ]"/>
 
 <xsl:variable name="cibtr:MapResourcesOperation"
               select="document('')/xsl:stylesheet
                         /cibtr:map/cibtr:table[
                           @for = 'resources-operation'
                         ]"/>
 
 <xsl:variable name="cibtr:MapResourcesOperationInstanceAttributes"
               select="document('')/xsl:stylesheet
                         /cibtr:map/cibtr:table[
                           @for = 'resource-operation-instance-attributes'
                         ]"/>
 
 <xsl:variable name="cibtr:MapConstraintsColocation"
               select="document('')/xsl:stylesheet
                         /cibtr:map/cibtr:table[
                           @for = 'constraints-colocation'
                         ]"/>
 
 <!--
 
  GENERIC UTILITIES
 
  -->
 
 <!--
  Plain identity template
 
  Merely implicit-context-driven, no arguments.
  -->
 <xsl:template name="cibtr:HelperIdentity">
   <xsl:copy>
     <xsl:apply-templates select="@*|node()"
                          mode="cibtr:main"/>
   </xsl:copy>
 </xsl:template>
 
 <!--
  Emit an message about the replacement, sanity checking the source definitions
 
  Merely parameter driven, no implicit context taken into account:
  - Context: optional message prefix
  - Replacement: selected subset of cibtr:map's leaves
                 (it's considered a hard error if consists of more than 1 item)
  -->
 <xsl:template name="cibtr:MapMsg">
   <xsl:param name="Context" select="''"/>
   <xsl:param name="Replacement"/>
   <xsl:choose>
     <xsl:when test="not($Replacement)"/>
     <xsl:when test="count($Replacement) != 1">
       <xsl:message terminate="yes">
         <xsl:value-of select="concat('INTERNAL ERROR:',
                                      $Replacement/../@msg-prefix,
                                      ': count($Replacement) != 1',
                                      ' does not hold (',
                                      count($Replacement), ')')"/>
       </xsl:message>
     </xsl:when>
     <xsl:otherwise>
       <xsl:variable name="MsgPrefix" select="concat(
                                                ($Replacement|$Replacement/..)
                                                  /@msg-prefix, ': '
                                              )"/>
       <xsl:message>
         <xsl:value-of select="$MsgPrefix"/>
         <xsl:if test="$Context">
           <xsl:value-of select="concat($Context, ': ')"/>
         </xsl:if>
         <xsl:choose>
           <xsl:when test="string($Replacement/@with)">
             <xsl:choose>
               <xsl:when test="string($Replacement/@where)">
                 <xsl:if test="not(
                                 contains(
                                   concat('|', $Replacement/../@where-cases, '|'),
                                   concat('|', $Replacement/@where, '|')
                                 )
                               )">
                   <xsl:message terminate="yes">
                     <xsl:value-of select="concat('INTERNAL ERROR:',
                                                  $Replacement/../@msg-prefix,
                                                  ': $Replacement/@where (',
                                                  $Replacement/@where, ') not in ',
                                                  concat('|',
                                                  $Replacement/../@where-cases,
                                                  '|'))"/>
                   </xsl:message>
                 </xsl:if>
                 <xsl:value-of select="concat('moving ', $Replacement/@what,
                                              ' under ', $Replacement/@where)"/>
               </xsl:when>
               <xsl:when test="$Replacement/@with = $Replacement/@what">
                 <xsl:value-of select="concat('keeping ', $Replacement/@what)"/>
               </xsl:when>
               <xsl:otherwise>
                 <xsl:value-of select="concat('renaming ', $Replacement/@what)"/>
               </xsl:otherwise>
             </xsl:choose>
             <xsl:value-of select="concat(' as ', $Replacement/@with)"/>
             <xsl:if test="$Replacement/@where">
               <xsl:value-of select="' unless already defined there'"/>
             </xsl:if>
           </xsl:when>
           <xsl:otherwise>
             <xsl:value-of select="concat('dropping ', $Replacement/@what)"/>
           </xsl:otherwise>
         </xsl:choose>
         <xsl:if test="string($Replacement/@redefined-as)">
           <xsl:value-of select="concat(', redefined as ',
                                        $Replacement/@redefined-as)"/>
           <xsl:if test="$Replacement/@in-case-of">
             <xsl:value-of select="','"/>
           </xsl:if>
         </xsl:if>
         <xsl:choose>
           <xsl:when test="string($Replacement/@in-case-of)">
             <xsl:value-of select="concat(' for matching ',
                                          $Replacement/@in-case-of)"/>
           </xsl:when>
           <xsl:when test="$Replacement/@in-case-of">
             <xsl:value-of select="' for matching &quot;empty string&quot;'"/>
           </xsl:when>
           <xsl:when test="$Replacement/@in-case-of-droppable-prefix">
             <xsl:value-of select="concat(' for matching ',
                                     $Replacement/@in-case-of-droppable-prefix,
                                     ' prefix that will, meanwhile, get dropped'
                                   )"/>
           </xsl:when>
         </xsl:choose>
       </xsl:message>
       <xsl:if test="$Replacement/@msg-extra">
         <xsl:message>
           <xsl:value-of select="concat($MsgPrefix, '... ',
                                        $Replacement/@msg-extra)"/>
         </xsl:message>
       </xsl:if>
     </xsl:otherwise>
   </xsl:choose>
 </xsl:template>
 
 <!--
  Produce a denormalized space if not present in the input (cf. trick A.)
 
  Merely parameter driven, no implicit context taken into account:
  - Source: input selection or result tree fragment to evaluate
  - ResultTreeFragment: optional self-explanatory flag related to Source
  -->
 <xsl:template name="cibtr:HelperDenormalizedSpace">
   <xsl:param name="Source"/>
   <xsl:param name="ResultTreeFragment" select="false()"/>
   <xsl:param name="InnerSimulation" select="false()"/>
   <xsl:choose>
     <xsl:when test="not($ResultTreeFragment)">
       <!-- intention here is that immediately surrounding text (mostly expected
            to be just indenting whitespace) and comments will be preserved;
            in case no denormalized space is present, " " is injected -->
       <xsl:variable name="ExistingSpace"
                     select="$Source/preceding-sibling::node()[
                               (
                                 self::comment()
                                 or
                                 self::text()
                               )
                               and
                               generate-id(following-sibling::*[1])
                               = generate-id($Source)
                             ]"/>
       <xsl:copy-of select="$ExistingSpace"/>
       <xsl:if test="not(
                       $ExistingSpace/self::text()[
                         normalize-space(.) != string(.)
                       ]
                     ) and $InnerSimulation">
         <xsl:text> </xsl:text>
       </xsl:if>
     </xsl:when>
     <xsl:when test="normalize-space($Source)
                     != string($Source)">
       <xsl:text> </xsl:text>
     </xsl:when>
   </xsl:choose>
 </xsl:template>
 
 <!--
 
  TRANSFORMATION HELPERS
 
  considerations, limitations, etc.:
  1. the transformations tries to preserve as much of the original XML
     as possible, incl. whitespace text/indentation and comments, but
     at times (corner cases of tricks A. + B. below), this needs to be
     sacrificed, e.g., distorting nice indentation, hence if the
     perfection is the goal:
     - user of the transformation can feed the minimized version of
       the XML (no denormalized/any white-space present)
     - user of the transformation can (re-)pretty-print the outcome
       afterwards
 
  tricks and conventions used:
  A. callable templates only return Result Tree Fragments, which means
     the only operations allowed are those looking at the underlying,
     virtual node-set, and since we need to discern their non-void
     production (i.e. on successful match/es), we use this trick:
     - ensure the template will not propagate any denormalized whitespace
     - inject denormalized whitespace (superfluous space) artificially
       to mark successful production (but see B. below)
     - with the template production, here stored as Var variable,
       we test "normalize-space($Var) != $Var" condition to detect
       non-void production, mainly intended to see whether to emit
       the enclosing element at all (with the goal of not leaving
       superfluous elements behind needlessly)
  B. [extension over A.] to eliminate distorted indentation
     (cf. consideration 1.), additional reuse of these callable
     templates is introduced: the template can recursively call
     itself with a special flag (InnerSimulation) as an oracle to
     see to whether non-void production will ensue (all pre-existing
     denormalized whitespace is forcefully removed in this mode),
     and if positive, all such inner pre-existing whitespace is
     then preserved in this outer=main invocation
  C. [extension over B.] when checking the non-void production
     (via InnerSimulation), beside the injected denormalized whitespace,
     we can also inject particular strings, which the callsite of such
     simulation can, in addition, inspect for paricular string
     occurrences, e.g. to prevent clashes on the production coming
     from multiple sources
  D. not only to honour DRY principle and to avoid inner entropy, it's
     often useful to make callable template bimodal, e.g., when the
     production is generated in the "what's to stay in place" vs.
     "what's to be propagated (combined with previous, effectively
     moved) at this other part of the tree" contexts; for such cases,
     there's usually InverseMode parameter to be assigned true()
     (implicit default) and false(), respectively
  E. the common idiom that emerges is: evaluate simulation value,
     depending on the presence of the "success mark" (cf. A.),
     possibly emit non-simulation value; since it would (likely)
     re-evaluate the simulation anew (wastefully) or perhaps
     this sort of dependency injection can just come handy,
     common transformation helpers below offer InnerPass
     parameter to be optionally passed, either as a string (when
     no-denormalized-space is an internal criterium for the template)
     or, conventionally, the result tree fragment representing the
     output of the template at hand called with a simulation flag
     * established signaling strings accompanying InnerSimulation=true:
       - TRIGGER-MSG ... make the template execution emit messages
                         describing changes being performed
       - TRIGGER-RECURSION
                     ... currently used in the oracle-like evaluation
                         of what's the situation with the sibling
                         elements as a recursion guard so that such
                         nested runs won't revisit the new set of
                         siblings per the respective nested context
 
  -->
 
 <!--
  Source ctxt:    cluster_property_set
  Target ctxt:    cluster_property_set
  Target-inv ctxt:/cib/configuration/(op_defaults|rsc_defaults)
                  [cluster_property_set -> meta_attributes]
  Dependencies:   N/A
  -->
 <xsl:template name="cibtr:ProcessClusterProperties">
   <xsl:param name="Source"/>
   <xsl:param name="InverseMode" select="false()"/>
   <xsl:param name="InnerSimulation" select="false()"/>
   <xsl:param name="InnerPass">
     <xsl:choose>
       <xsl:when test="$InnerSimulation">
         <xsl:value-of select="''"/>
       </xsl:when>
       <xsl:otherwise>
         <xsl:call-template name="cibtr:ProcessClusterProperties">
           <xsl:with-param name="Source" select="$Source"/>
           <xsl:with-param name="InverseMode" select="$InverseMode"/>
           <xsl:with-param name="InnerSimulation" select="true()"/>
         </xsl:call-template>
       </xsl:otherwise>
     </xsl:choose>
   </xsl:param>
 
   <xsl:for-each select="$Source/node()">
     <xsl:choose>
       <xsl:when test="self::text()">
         <!-- cf. trick A. (consideration 1.) -->
         <xsl:choose>
           <xsl:when test="normalize-space($InnerPass)
                           != $InnerPass
                           and
                           (
                             not(following-sibling::nvpair)
                             or
                             generate-id(following-sibling::nvpair[1])
                             != generate-id(following-sibling::*[1])
                           )">
             <xsl:value-of select="."/>
           </xsl:when>
           <xsl:otherwise>
             <xsl:value-of select="normalize-space(.)"/>
           </xsl:otherwise>
         </xsl:choose>
       </xsl:when>
       <xsl:when test="self::nvpair">
         <xsl:variable name="Replacement"
                       select="$cibtr:MapClusterProperties/cibtr:replace[
                                 @what = current()/@name
                                 and
                                 (
                                   (
                                     @in-case-of
                                     and
                                     contains(concat('|', @in-case-of, '|'),
                                              concat('|', current()/@value, '|'))
                                   )
                                   or
                                   (
                                     not(@in-case-of)
                                     and
                                     not(
                                       $cibtr:MapClusterProperties/cibtr:replace[
                                         @what = current()/@name
                                         and
                                         @in-case-of
                                         and
                                         contains(concat('|', @in-case-of, '|'),
                                                  concat('|', current()/@value, '|'))
                                       ]
                                     )
                                   )
                                 )
                               ]"/>
         <xsl:if test="$InnerPass = 'TRIGGER-MSG'">
           <xsl:call-template name="cibtr:MapMsg">
             <xsl:with-param name="Context" select="@id"/>
             <xsl:with-param name="Replacement" select="$Replacement"/>
           </xsl:call-template>
         </xsl:if>
         <xsl:choose>
           <xsl:when test="$Replacement
                           and
                           (
                             not(string($Replacement/@with))
                             or
                             $Replacement/@where
                           )">
             <!-- drop (possibly just move over) -->
             <xsl:if test="$Replacement/@where
                           and
                           (
                             (
                               normalize-space($InverseMode)
                               and
                               $Replacement/@where = $InverseMode
                             )
                             or
                             (
                               not(normalize-space($InverseMode))
                               and
                               (true() or count($InverseMode))
                               and
                               not(
                                 $InverseMode/nvpair[
                                   @name = $Replacement/@with
                                 ]
                               )
                               and
                               $Replacement/@where = name($InverseMode/..)
                             )
                           )">
               <xsl:call-template name="cibtr:HelperDenormalizedSpace">
                 <xsl:with-param name="Source" select="."/>
                 <xsl:with-param name="InnerSimulation" select="$InnerSimulation"/>
               </xsl:call-template>
               <xsl:copy>
                 <xsl:for-each select="@*">
                   <xsl:choose>
                     <xsl:when test="name() = 'name'">
                       <xsl:attribute name="{name()}">
                         <xsl:value-of select="$Replacement/@with"/>
                       </xsl:attribute>
                     </xsl:when>
                     <xsl:when test="string($Replacement/@redefined-as)
                                     and
                                     name() = 'value'">
                       <xsl:attribute name="{name()}">
                         <xsl:value-of select="$Replacement/@redefined-as"/>
                       </xsl:attribute>
                     </xsl:when>
                     <xsl:otherwise>
                       <xsl:copy/>
                     </xsl:otherwise>
                   </xsl:choose>
                 </xsl:for-each>
               </xsl:copy>
             </xsl:if>
           </xsl:when>
           <xsl:when test="$InverseMode"/>
           <xsl:when test="$Replacement">
             <xsl:call-template name="cibtr:HelperDenormalizedSpace">
               <xsl:with-param name="Source" select="."/>
               <xsl:with-param name="InnerSimulation" select="$InnerSimulation"/>
             </xsl:call-template>
             <xsl:copy>
               <xsl:for-each select="@*">
                 <xsl:choose>
                   <xsl:when test="name() = 'name'">
                     <xsl:attribute name="{name()}">
                       <xsl:value-of select="$Replacement/@with"/>
                     </xsl:attribute>
                   </xsl:when>
                   <xsl:when test="string($Replacement/@redefined-as)
                                   and
                                   name() = 'value'">
                     <xsl:attribute name="{name()}">
                       <xsl:value-of select="$Replacement/@redefined-as"/>
                     </xsl:attribute>
                   </xsl:when>
                   <xsl:otherwise>
                     <xsl:copy/>
                   </xsl:otherwise>
                 </xsl:choose>
               </xsl:for-each>
             </xsl:copy>
           </xsl:when>
           <xsl:otherwise>
             <xsl:call-template name="cibtr:HelperDenormalizedSpace">
               <xsl:with-param name="Source" select="."/>
               <xsl:with-param name="InnerSimulation" select="$InnerSimulation"/>
             </xsl:call-template>
             <xsl:call-template name="cibtr:HelperIdentity"/>
           </xsl:otherwise>
         </xsl:choose>
       </xsl:when>
       <xsl:when test="$InverseMode
                       or
                       self::comment()">
         <!-- drop -->
       </xsl:when>
       <xsl:otherwise>
         <xsl:call-template name="cibtr:HelperIdentity"/>
       </xsl:otherwise>
     </xsl:choose>
   </xsl:for-each>
 </xsl:template>
 
 <!--
  Source ctxt:    (primitive|template)/instance_attributes
  Target ctxt:    (primitive|template)/instance_attributes
  Target-inv ctxt:N/A
  Dependencies:   N/A
  -->
 <xsl:template name="cibtr:ProcessRscInstanceAttributes">
   <xsl:param name="Source"/>
   <xsl:param name="InnerSimulation" select="false()"/>
   <xsl:param name="InnerPass">
     <xsl:choose>
       <xsl:when test="$InnerSimulation">
         <xsl:value-of select="''"/>
       </xsl:when>
       <xsl:otherwise>
         <xsl:call-template name="cibtr:ProcessRscInstanceAttributes">
           <xsl:with-param name="Source" select="$Source"/>
           <xsl:with-param name="InnerSimulation" select="true()"/>
         </xsl:call-template>
       </xsl:otherwise>
     </xsl:choose>
   </xsl:param>
 
   <!-- B: special-casing nvpair -->
   <xsl:for-each select="$Source/node()">
     <xsl:choose>
       <xsl:when test="self::text()">
         <!-- cf. trick A. (consideration 1.) -->
         <xsl:choose>
           <xsl:when test="normalize-space($InnerPass)
                           != $InnerPass
                           and
                           (
                             not(following-sibling::nvpair)
                             or
                             generate-id(following-sibling::nvpair[1])
                             != generate-id(following-sibling::*[1])
                           )">
             <xsl:value-of select="."/>
           </xsl:when>
           <xsl:otherwise>
             <xsl:value-of select="normalize-space(.)"/>
           </xsl:otherwise>
         </xsl:choose>
       </xsl:when>
       <xsl:when test="self::nvpair">
         <xsl:variable name="Replacement"
                       select="$cibtr:MapResourceInstanceAttributes/cibtr:replace[
                                 @what = current()/@name
                                 and
                                 (
                                   (
                                     @in-case-of
                                     and
                                     contains(concat('|', @in-case-of, '|'),
                                              concat('|', current()/@value, '|'))
                                   )
                                   or
                                   (
                                     @in-case-of-droppable-prefix
                                     and
                                     starts-with(current()/@value,
                                                 @in-case-of-droppable-prefix)
                                     and
                                     not(
                                       contains(current()/@value, ',')
                                     )
                                   )
                                   or
                                   (
                                     not(@in-case-of)
                                     and
                                     not(@in-case-of-droppable-prefix)
                                     and
                                     not(
                                       $cibtr:MapResourceInstanceAttributes/cibtr:replace[
                                         @what = current()/@name
                                         and
                                         (
                                           (
                                             @in-case-of
                                             and
                                             contains(concat('|', @in-case-of, '|'),
                                                      concat('|', current()/@value, '|'))
                                           )
                                           or
                                           (
                                             @in-case-of-droppable-prefix
                                             and
                                             starts-with(current()/@value,
                                                         @in-case-of-droppable-prefix)
                                             and
                                             not(
                                               contains(current()/@value, ',')
                                             )
                                           )
                                         )
                                       ]
                                     )
                                   )
                                 )
                               ]"/>
         <xsl:if test="$InnerPass = 'TRIGGER-MSG'">
           <xsl:call-template name="cibtr:MapMsg">
             <xsl:with-param name="Context" select="@id"/>
             <xsl:with-param name="Replacement" select="$Replacement"/>
           </xsl:call-template>
         </xsl:if>
         <xsl:choose>
           <xsl:when test="$Replacement
                           and
                           not(string($Replacement/@with))">
             <!-- drop (move-over code missing) -->
           </xsl:when>
           <xsl:when test="$Replacement">
             <!-- plain rename -->
             <xsl:call-template name="cibtr:HelperDenormalizedSpace">
               <xsl:with-param name="Source" select="."/>
               <xsl:with-param name="InnerSimulation" select="$InnerSimulation"/>
             </xsl:call-template>
             <xsl:copy>
               <xsl:for-each select="@*">
                 <xsl:choose>
                   <xsl:when test="name() = 'name'">
                     <xsl:attribute name="{name()}">
                       <xsl:value-of select="$Replacement/@with"/>
                     </xsl:attribute>
                   </xsl:when>
                   <xsl:when test="string($Replacement/@redefined-as)
                                   and
                                   name() = 'value'">
                     <xsl:attribute name="{name()}">
                       <xsl:value-of select="$Replacement/@redefined-as"/>
                     </xsl:attribute>
                   </xsl:when>
                   <xsl:when test="string($Replacement/@in-case-of-droppable-prefix)
                                   and
                                   name() = 'value'">
                     <xsl:attribute name="{name()}">
                       <xsl:value-of select="substring-after(
                                               ., $Replacement/@in-case-of-droppable-prefix
                                             )"/>
                     </xsl:attribute>
                   </xsl:when>
                   <xsl:otherwise>
                     <xsl:copy/>
                   </xsl:otherwise>
                 </xsl:choose>
               </xsl:for-each>
             </xsl:copy>
           </xsl:when>
           <xsl:otherwise>
             <xsl:call-template name="cibtr:HelperDenormalizedSpace">
               <xsl:with-param name="Source" select="."/>
               <xsl:with-param name="InnerSimulation" select="$InnerSimulation"/>
             </xsl:call-template>
             <xsl:call-template name="cibtr:HelperIdentity"/>
           </xsl:otherwise>
         </xsl:choose>
       </xsl:when>
       <xsl:otherwise>
         <xsl:call-template name="cibtr:HelperIdentity"/>
       </xsl:otherwise>
     </xsl:choose>
   </xsl:for-each>
   <!-- E: special-casing nvpair -->
 </xsl:template>
 
 <!--
  Source ctxt:    (primitive|template)/meta_attributes
  Target ctxt:    (primitive|template)/meta_attributes
  Target-inv ctxt:N/A
  Dependencies:   N/A
  -->
 <xsl:template name="cibtr:ProcessRscMetaAttributes">
   <xsl:param name="Source"/>
   <xsl:param name="InnerSimulation" select="false()"/>
   <xsl:param name="InnerPass">
     <xsl:choose>
       <xsl:when test="$InnerSimulation">
         <xsl:value-of select="''"/>
       </xsl:when>
       <xsl:otherwise>
         <xsl:call-template name="cibtr:ProcessRscMetaAttributes">
           <xsl:with-param name="Source" select="$Source"/>
           <xsl:with-param name="InnerSimulation" select="true()"/>
         </xsl:call-template>
       </xsl:otherwise>
     </xsl:choose>
   </xsl:param>
 
   <!-- B: special-casing nvpair -->
   <xsl:for-each select="$Source/node()">
     <xsl:choose>
       <xsl:when test="self::text()">
         <!-- cf. trick A. (consideration 1.) -->
         <xsl:choose>
           <xsl:when test="normalize-space($InnerPass)
                           != $InnerPass
                           and
                           (
                             not(following-sibling::nvpair)
                             or
                             generate-id(following-sibling::nvpair[1])
                             != generate-id(following-sibling::*[1])
                           )">
             <xsl:value-of select="."/>
           </xsl:when>
           <xsl:otherwise>
             <xsl:value-of select="normalize-space(.)"/>
           </xsl:otherwise>
         </xsl:choose>
       </xsl:when>
       <xsl:when test="self::nvpair">
         <xsl:variable name="Replacement"
                       select="$cibtr:MapResourceMetaAttributes/cibtr:replace[
                                 @what = current()/@name
                                 and
                                 (
                                   (
                                     @in-case-of
                                     and
                                     contains(concat('|', @in-case-of, '|'),
                                              concat('|', current()/@value, '|'))
                                   )
                                   or
                                   (
                                     not(@in-case-of)
                                     and
                                     not(
                                       $cibtr:MapResourceMetaAttributes/cibtr:replace[
                                         @what = current()/@name
                                         and
                                         (
                                           @in-case-of
                                           and
                                           contains(concat('|', @in-case-of, '|'),
                                                    concat('|', current()/@value, '|'))
                                         )
                                       ]
                                     )
                                   )
                                 )
                               ]"/>
         <xsl:if test="$InnerPass = 'TRIGGER-MSG'">
           <xsl:call-template name="cibtr:MapMsg">
             <xsl:with-param name="Context"
                             select="concat(../../@id,
                                            ' (meta=', ../@id,
                                            ')')"/>
             <xsl:with-param name="Replacement" select="$Replacement"/>
           </xsl:call-template>
         </xsl:if>
         <xsl:choose>
           <xsl:when test="$Replacement
                           and
                           not(string($Replacement/@with))">
             <!-- drop (move-over code missing) -->
           </xsl:when>
           <xsl:when test="$Replacement">
             <!-- plain rename -->
             <xsl:variable name="SimulateFollowingSiblings">
               <!-- prevent generating redundant name-value pairs -->
               <xsl:for-each select="(..|../following-sibling::meta_attributes)[
                                       not(rule)
                                     ]">
                 <xsl:if test="$InnerPass != 'TRIGGER-RECURSION'">
                   <xsl:call-template name="cibtr:ProcessRscMetaAttributes">
                     <xsl:with-param name="Source" select="."/>
                     <xsl:with-param name="InnerSimulation" select="true()"/>
                     <xsl:with-param name="InnerPass" select="'TRIGGER-RECURSION'"/>
                   </xsl:call-template>
                 </xsl:if>
               </xsl:for-each>
             </xsl:variable>
             <xsl:choose>
               <!-- instead of HelperDenormalizedSpace -->
               <xsl:when test="$InnerSimulation">
                 <xsl:value-of select="concat(generate-id(), '@', $Replacement/@with, ' ')"/>
               </xsl:when>
               <xsl:otherwise>
                 <xsl:if test="not(
                                 contains($SimulateFollowingSiblings,
                                          concat($Replacement/@with, ' '))
                               )
                               or
                               generate-id()
                               =
                               substring-before($SimulateFollowingSiblings,
                                                concat('@', $Replacement/@with))">
                   <xsl:call-template name="cibtr:HelperDenormalizedSpace">
                     <xsl:with-param name="Source" select="."/>
                     <xsl:with-param name="InnerSimulation" select="$InnerSimulation"/>
                   </xsl:call-template>
                   <xsl:copy>
                     <xsl:for-each select="@*">
                       <xsl:choose>
                         <xsl:when test="name() = 'name'">
                           <xsl:attribute name="{name()}">
                             <xsl:value-of select="$Replacement/@with"/>
                           </xsl:attribute>
                         </xsl:when>
                         <xsl:when test="string($Replacement/@redefined-as)
                                         and
                                         name() = 'value'">
                           <xsl:attribute name="{name()}">
                             <xsl:value-of select="$Replacement/@redefined-as"/>
                           </xsl:attribute>
                         </xsl:when>
                         <xsl:otherwise>
                           <xsl:copy/>
                         </xsl:otherwise>
                       </xsl:choose>
                     </xsl:for-each>
                   </xsl:copy>
                 </xsl:if>
               </xsl:otherwise>
             </xsl:choose>
           </xsl:when>
           <xsl:otherwise>
             <xsl:call-template name="cibtr:HelperDenormalizedSpace">
               <xsl:with-param name="Source" select="."/>
               <xsl:with-param name="InnerSimulation" select="$InnerSimulation"/>
             </xsl:call-template>
             <xsl:call-template name="cibtr:HelperIdentity"/>
           </xsl:otherwise>
         </xsl:choose>
       </xsl:when>
       <xsl:otherwise>
         <xsl:call-template name="cibtr:HelperIdentity"/>
       </xsl:otherwise>
     </xsl:choose>
   </xsl:for-each>
   <!-- E: special-casing nvpair -->
 </xsl:template>
 
 <!--
  Source ctxt:    (primitive|template)/operations/op/instance_attributes
  Target ctxt:    (primitive|template)/operations/op/instance_attributes
  Target-inv ctxt:(primitive|template)/operations/op/meta_attributes
  Dependencies:   ProcessNonattrOpMetaAttributes [inverse only]
  -->
 <xsl:template name="cibtr:ProcessOpInstanceAttributes">
   <xsl:param name="Source"/>
   <xsl:param name="InverseMode" select="false()"/>
   <xsl:param name="InnerSimulation" select="false()"/>
   <xsl:param name="InnerPass">
     <xsl:choose>
       <xsl:when test="$InnerSimulation">
         <xsl:value-of select="''"/>
       </xsl:when>
       <xsl:otherwise>
         <xsl:call-template name="cibtr:ProcessOpInstanceAttributes">
           <xsl:with-param name="Source" select="$Source"/>
           <xsl:with-param name="InnerSimulation" select="true()"/>
         </xsl:call-template>
       </xsl:otherwise>
     </xsl:choose>
   </xsl:param>
 
   <xsl:variable name="EnclosingTag" select="../../.."/>
 
   <!-- B: special-casing nvpair -->
   <xsl:for-each select="$Source/node()">
     <xsl:choose>
       <xsl:when test="self::text()">
         <!-- cf. trick A. (consideration 1.) -->
         <xsl:choose>
           <xsl:when test="normalize-space($InnerPass)
                           != $InnerPass
                           and
                           (
                             not(following-sibling::nvpair)
                             or
                             generate-id(following-sibling::nvpair[1])
                             != generate-id(following-sibling::*[1])
                           )">
             <xsl:value-of select="."/>
           </xsl:when>
           <xsl:otherwise>
             <xsl:value-of select="normalize-space(.)"/>
           </xsl:otherwise>
         </xsl:choose>
       </xsl:when>
       <xsl:when test="self::nvpair">
         <xsl:variable name="Replacement"
                       select="$cibtr:MapResourcesOperationInstanceAttributes/cibtr:replace[
                                 @what = current()/@name
                                 and
                                 (
                                   (
                                     @in-case-of
                                     and
                                     contains(concat('|', @in-case-of, '|'),
                                              concat('|', current()/../../@name, '|'))
                                   )
                                   or
                                   (
                                     not(@in-case-of)
                                     and
                                     not(
                                       $cibtr:MapResourcesOperationInstanceAttributes/cibtr:replace[
                                         @what = current()/@name
                                         and
                                         @in-case-of
                                         and
                                         contains(concat('|', @in-case-of, '|'),
                                                  concat('|', current()/../../@name, '|'))
                                       ]
                                     )
                                   )
                                 )
                               ]"/>
         <xsl:if test="$InnerPass = 'TRIGGER-MSG'">
           <xsl:call-template name="cibtr:MapMsg">
             <xsl:with-param name="Context"
                             select="concat(../../@id,
                                            ' (rsc=', $EnclosingTag/@id,
                                            ', meta=', ../@id,
                                            ')')"/>
             <xsl:with-param name="Replacement" select="$Replacement"/>
           </xsl:call-template>
         </xsl:if>
         <xsl:choose>
           <xsl:when test="$Replacement
                           and
                           (
                             not(string($Replacement/@with))
                             or
                             $Replacement/@where
                           )">
             <!-- drop (possibly just move over) -->
             <xsl:variable name="SimulateAttrOverrides">
               <xsl:for-each select="../../../op">
                 <xsl:call-template name="cibtr:ProcessAttrOpMetaAttributes">
                   <xsl:with-param name="Source" select="."/>
                   <xsl:with-param name="InverseMode" select="true()"/>
                   <xsl:with-param name="InnerSimulation" select="true()"/>
                 </xsl:call-template>
               </xsl:for-each>
             </xsl:variable>
             <xsl:if test="$InverseMode
                           and
                           not(
                             contains($SimulateAttrOverrides,
                                      concat(@name, ' '))
                           )">
               <!-- do not override; do not collide with:
                    - newly added from op/@* (see last condition above)
                    - existing - actually subsumed with the previous point
                    - successors sourced like this (see below) -->
               <xsl:variable name="SimulateFollowingSiblingsMeta">
                 <!-- cf. similar handling in ProcessAttrOpMetaAttributes,
                      but this is more convoluted -->
                 <xsl:for-each select="(../following-sibling::meta_attributes
                                        |../../following-sibling::op/meta_attributes)[
                                         not(rule)
                                       ]">
                   <xsl:call-template name="cibtr:ProcessNonattrOpMetaAttributes">
                     <xsl:with-param name="Source" select="."/>
                     <xsl:with-param name="InverseMode" select="true()"/>
                     <xsl:with-param name="InnerSimulation" select="true()"/>
                   </xsl:call-template>
                 </xsl:for-each>
               </xsl:variable>
               <xsl:variable name="SimulateFollowingSiblingsInstance">
                 <xsl:for-each select="../following-sibling::instance_attributes[
                                         not(rule)
                                       ]">
                   <xsl:call-template name="cibtr:ProcessOpInstanceAttributes">
                     <xsl:with-param name="Source" select="."/>
                     <xsl:with-param name="InverseMode" select="true()"/>
                     <xsl:with-param name="InnerSimulation" select="true()"/>
                   </xsl:call-template>
                 </xsl:for-each>
               </xsl:variable>
               <xsl:if test="$Replacement/@where = 'meta_attributes'
                             and
                             not(
                               $EnclosingTag/meta_attributes[
                                 not(rule)
                                 and
                                 nvpair/@name = $Replacement/@with
                               ]
                             )
                             and
                             not(
                               contains($SimulateFollowingSiblingsInstance,
                                        concat(@name, ' '))
                             )">
                 <!-- cf. trick C. (indicate for inverse mode) -->
                 <xsl:choose>
                   <xsl:when test="$InnerSimulation">
                     <!-- instead of HelperDenormalizedSpace -->
                     <xsl:value-of select="concat(@name, ' ')"/>
                   </xsl:when>
                   <xsl:otherwise>
                     <xsl:call-template name="cibtr:HelperDenormalizedSpace">
                       <xsl:with-param name="Source" select="."/>
                       <xsl:with-param name="InnerSimulation" select="$InnerSimulation"/>
                     </xsl:call-template>
                     <xsl:copy>
                       <xsl:apply-templates select="@*"
                                            mode="cibtr:main"/>
                     </xsl:copy>
                   </xsl:otherwise>
                 </xsl:choose>
               </xsl:if>
             </xsl:if>
           </xsl:when>
           <xsl:when test="$Replacement">
             <xsl:message terminate="yes">
               <xsl:value-of select="concat('INTERNAL ERROR: ',
                                            $Replacement/../@msg-prefix,
                                            ': no in-situ rename',
                                            ' does not hold (',
                                            not(($InverseMode)), ')')"/>
             </xsl:message>
           </xsl:when>
           <xsl:when test="$InverseMode"/>
           <xsl:otherwise>
             <xsl:call-template name="cibtr:HelperDenormalizedSpace">
               <xsl:with-param name="Source" select="."/>
               <xsl:with-param name="InnerSimulation" select="$InnerSimulation"/>
             </xsl:call-template>
             <xsl:call-template name="cibtr:HelperIdentity"/>
           </xsl:otherwise>
         </xsl:choose>
       </xsl:when>
       <xsl:when test="$InverseMode
                       or
                       self::comment()">
         <!-- drop -->
       </xsl:when>
       <xsl:otherwise>
         <xsl:call-template name="cibtr:HelperIdentity"/>
       </xsl:otherwise>
     </xsl:choose>
   </xsl:for-each>
   <!-- E: special-casing nvpair -->
 </xsl:template>
 
 <!--
  Source ctxt:    (primitive|template)/operations/op/meta_attributes
                  (primitive|template)/operations/op/instance_attributes (inverse only)
  Target ctxt:    (primitive|template)/operations/op/meta_attributes
  Target-inv ctxt:(primitive|template)/meta_attributes
  Dependencies:   ProcessAttrOpMetaAttributes
                  ProcessNonattrOpMetaAttributes
  -->
 <xsl:template name="cibtr:ProcessNonattrOpMetaAttributes">
   <xsl:param name="Source"/>
   <xsl:param name="InverseMode" select="false()"/>
   <xsl:param name="InnerSimulation" select="false()"/>
   <xsl:param name="InnerPass">
     <xsl:choose>
       <xsl:when test="$InnerSimulation">
         <xsl:value-of select="''"/>
       </xsl:when>
       <xsl:otherwise>
         <xsl:call-template name="cibtr:ProcessNonattrOpMetaAttributes">
           <xsl:with-param name="Source" select="$Source"/>
           <xsl:with-param name="InnerSimulation" select="true()"/>
         </xsl:call-template>
       </xsl:otherwise>
     </xsl:choose>
   </xsl:param>
 
   <xsl:variable name="EnclosingTag" select="../../.."/>
 
   <xsl:for-each select="$Source/node()">
     <xsl:choose>
       <xsl:when test="self::text()
                       and
                       not($InverseMode)">
         <!-- cf. trick A. (consideration 1.) -->
         <xsl:choose>
           <xsl:when test="normalize-space($InnerPass)
                           != $InnerPass
                           and
                           (
                             not(following-sibling::nvpair)
                             or
                             generate-id(following-sibling::nvpair[1])
                             != generate-id(following-sibling::*[1])
                           )">
             <xsl:value-of select="."/>
           </xsl:when>
           <xsl:otherwise>
             <xsl:value-of select="normalize-space(.)"/>
           </xsl:otherwise>
         </xsl:choose>
       </xsl:when>
       <xsl:when test="self::nvpair">
         <xsl:variable name="Replacement"
                       select="$cibtr:MapResourcesOperation/cibtr:replace[
                                 @what = current()/@name
                                 and
                                 (
                                   (
                                     @in-case-of
                                     and
                                     contains(concat('|', @in-case-of, '|'),
                                              concat('|', current()/../../@name, '|'))
                                   )
                                   or
                                   (
                                     not(@in-case-of)
                                     and
                                     not(
                                       $cibtr:MapResourcesOperation/cibtr:replace[
                                         @what = current()/@name
                                         and
                                         @in-case-of
                                         and
                                         contains(concat('|', @in-case-of, '|'),
                                                  concat('|', current()/../../@name, '|'))
                                       ]
                                     )
                                   )
                                 )
                               ]"/>
         <xsl:if test="$InnerPass = 'TRIGGER-MSG'">
           <xsl:call-template name="cibtr:MapMsg">
             <xsl:with-param name="Context"
                             select="concat(../../@id,
                                            ' (rsc=', $EnclosingTag/@id,
                                            ', meta=', ../@id,
                                            ')')"/>
             <xsl:with-param name="Replacement" select="$Replacement"/>
           </xsl:call-template>
         </xsl:if>
         <xsl:choose>
           <xsl:when test="$Replacement
                           and
                           (
                             not(string($Replacement/@with))
                             or
                             $Replacement/@where
                           )">
             <!-- drop (possibly just move over) -->
             <xsl:if test="$InverseMode">
               <xsl:variable name="SimulateAttrOverrides">
                 <xsl:for-each select="../../../op">
                   <xsl:call-template name="cibtr:ProcessAttrOpMetaAttributes">
                     <xsl:with-param name="Source" select="."/>
                     <xsl:with-param name="InverseMode" select="true()"/>
                     <xsl:with-param name="InnerSimulation" select="true()"/>
                   </xsl:call-template>
                 </xsl:for-each>
               </xsl:variable>
               <xsl:if test="not(
                               contains($SimulateAttrOverrides,
                                        concat(@name, ' '))
                             )">
                 <!-- do not override; do not collide with:
                      - newly added from op/@* (see last condition above)
                      - existing - actually subsumed with the previous point
                      - successors sourced like this (see below)
                      and if coming from op/instance_attributes, add also
                      - any meta_attributes sourced like this -->
                 <xsl:variable name="SimulateFollowingSiblings">
                   <!-- cf. similar handling in ProcessAttrOpMetaAttributes,
                        but this is more convoluted -->
                   <xsl:if test="name(..) = 'meta_attributes'">
                     <xsl:for-each select="(../following-sibling::meta_attributes
                                            |../../following-sibling::op/meta_attributes)[
                                             not(rule)
                                           ]">
                       <xsl:call-template name="cibtr:ProcessNonattrOpMetaAttributes">
                         <xsl:with-param name="Source" select="."/>
                         <xsl:with-param name="InverseMode" select="true()"/>
                         <xsl:with-param name="InnerSimulation" select="true()"/>
                       </xsl:call-template>
                     </xsl:for-each>
                   </xsl:if>
                   <xsl:if test="name(..) = 'instance_attributes'">
                     <xsl:for-each select="(../following-sibling::instance_attributes
                                            |../../following-sibling::op/instance_attributes
                                            |../../meta_attributes
                                            |../../../op/meta_attributes)[
                                             not(rule)
                                           ]">
                       <xsl:call-template name="cibtr:ProcessNonattrOpMetaAttributes">
                         <xsl:with-param name="Source" select="."/>
                         <xsl:with-param name="InverseMode" select="true()"/>
                         <xsl:with-param name="InnerSimulation" select="true()"/>
                       </xsl:call-template>
                     </xsl:for-each>
                   </xsl:if>
                 </xsl:variable>
                 <xsl:if test="$Replacement/@where = 'meta_attributes'
                               and
                               not(
                                 $EnclosingTag/meta_attributes[
                                   not(rule)
                                   and
                                   nvpair/@name = $Replacement/@with
                                 ]
                               )
                               and
                               not(
                                 contains($SimulateFollowingSiblings,
                                          concat(@name, ' '))
                               )">
                   <!-- cf. trick C. (indicate for inverse mode) -->
                   <xsl:choose>
                     <!-- instead of HelperDenormalizedSpace -->
                     <xsl:when test="$InnerSimulation">
                       <xsl:value-of select="concat(@name, ' ')"/>
                     </xsl:when>
                     <xsl:otherwise>
                       <xsl:copy>
                         <xsl:apply-templates select="@*"
                                              mode="cibtr:main"/>
                       </xsl:copy>
                     </xsl:otherwise>
                   </xsl:choose>
                 </xsl:if>
               </xsl:if>
             </xsl:if>
           </xsl:when>
           <xsl:when test="$Replacement">
             <xsl:message terminate="yes">
               <xsl:value-of select="concat('INTERNAL ERROR: ',
                                            $Replacement/../@msg-prefix,
                                            ': no in-situ rename',
                                            ' does not hold (',
                                            not(($InverseMode)), ')')"/>
             </xsl:message>
           </xsl:when>
           <xsl:when test="$InverseMode"/>
           <xsl:otherwise>
             <xsl:call-template name="cibtr:HelperDenormalizedSpace">
               <xsl:with-param name="Source" select="."/>
               <xsl:with-param name="InnerSimulation" select="$InnerSimulation"/>
             </xsl:call-template>
             <xsl:call-template name="cibtr:HelperIdentity"/>
           </xsl:otherwise>
         </xsl:choose>
       </xsl:when>
       <xsl:when test="$InverseMode
                       or
                       self::comment()">
         <!-- drop -->
       </xsl:when>
       <xsl:otherwise>
         <xsl:call-template name="cibtr:HelperIdentity"/>
       </xsl:otherwise>
     </xsl:choose>
   </xsl:for-each>
 </xsl:template>
 
 <!--
  Source ctxt:    (primitive|template)/operations/op
  Target ctxt:    (primitive|template)/operations/op/meta_attributes
  Target-inv ctxt:(primitive|template)/meta_attributes
  Dependencies:   ProcessNonattrOpMetaAttributes [non-inverse only]
                  ProcessOpInstanceAttributes [non-inverse only]
  -->
 <xsl:template name="cibtr:ProcessAttrOpMetaAttributes">
   <xsl:param name="Source"/>
   <xsl:param name="InverseMode" select="false()"/>
   <xsl:param name="InnerSimulation" select="false()"/>
   <xsl:param name="InnerPass">
     <xsl:choose>
       <xsl:when test="$InnerSimulation">
         <xsl:value-of select="''"/>
       </xsl:when>
       <xsl:otherwise>
         <xsl:call-template name="cibtr:ProcessAttrOpMetaAttributes">
           <xsl:with-param name="Source" select="$Source"/>
           <xsl:with-param name="InverseMode" select="$InverseMode"/>
           <xsl:with-param name="InnerSimulation" select="true()"/>
         </xsl:call-template>
       </xsl:otherwise>
     </xsl:choose>
   </xsl:param>
 
   <xsl:variable name="EnclosingTag" select="../.."/>
 
   <xsl:if test="(
                   $InverseMode
                   and
                   (
                     $InnerSimulation
                     or
                     normalize-space($InnerPass)
                     != string($InnerPass)
                   )
                 )
                 or
                 not($InverseMode)">
     <xsl:if test="$InverseMode
                   and
                   $InnerSimulation">
       <xsl:call-template name="cibtr:HelperDenormalizedSpace">
         <xsl:with-param name="Source" select="$InnerPass"/>
         <xsl:with-param name="ResultTreeFragment" select="true()"/>
       </xsl:call-template>
     </xsl:if>
 
     <!-- cannot combine "copy" with creating a new element, hence we mimic
          "copy" with recreating the element anew, while still using just
          a single for-each loop -->
     <xsl:variable name="ParentName">
       <xsl:choose>
         <xsl:when test="not($InverseMode)">
           <xsl:value-of select="name()"/>
         </xsl:when>
         <xsl:otherwise>
           <xsl:value-of select="'nvpair'"/>
         </xsl:otherwise>
       </xsl:choose>
     </xsl:variable>
     <xsl:element name="{$ParentName}">
     <!-- B: special-casing @* -->
     <xsl:for-each select="@*">
       <xsl:variable name="Replacement"
                     select="$cibtr:MapResourcesOperation/cibtr:replace[
                               @what = name(current())
                               and
                               (
                                 (
                                   @in-case-of
                                   and
                                   contains(concat('|', @in-case-of, '|'),
                                            concat('|', current()/../@name, '|'))
                                 )
                                 or
                                 (
                                   not(@in-case-of)
                                   and
                                   not(
                                     $cibtr:MapResourcesOperation/cibtr:replace[
                                       @what = name(current())
                                       and
                                       @in-case-of
                                       and
                                       contains(concat('|', @in-case-of, '|'),
                                                concat('|', current()/../@name, '|'))
                                     ]
                                   )
                                 )
                               )
                             ]"/>
       <xsl:if test="$InnerPass = 'TRIGGER-MSG'">
         <xsl:call-template name="cibtr:MapMsg">
           <xsl:with-param name="Context"
                                 select="concat(../@id,
                                                ' (rsc=', $EnclosingTag/@id,
                                                ')')"/>
           <xsl:with-param name="Replacement" select="$Replacement"/>
         </xsl:call-template>
       </xsl:if>
       <xsl:choose>
         <!-- use inner simulation to find out if success,
              then emit also extra denormalized space -->
         <xsl:when test="$InverseMode
                         and
                         $Replacement/@where = 'meta_attributes'
                         and
                         not(
                           $EnclosingTag/meta_attributes[
                             not(rule)
                             and
                             nvpair/@name = $Replacement/@with
                           ]
                         )">
           <!-- do not override; do not collide with:
                - existing (see last condition above)
                - successors sourced like this (see below) -->
           <xsl:variable name="SimulateFollowingSiblings">
             <xsl:for-each select="../following-sibling::op">
               <xsl:call-template name="cibtr:ProcessAttrOpMetaAttributes">
                 <xsl:with-param name="Source" select="."/>
                 <xsl:with-param name="InverseMode" select="true()"/>
                 <xsl:with-param name="InnerSimulation" select="true()"/>
               </xsl:call-template>
             </xsl:for-each>
           </xsl:variable>
           <xsl:if test="not(contains($SimulateFollowingSiblings,
                                      concat(name(), ' ')))">
             <!-- fix concurrent op/@* sources (these themselves are winning
                  over sources from meta_attributes -->
             <xsl:choose>
               <xsl:when test="$InnerSimulation">
                 <!-- cf. trick C. (indicate for inverse mode) -->
                 <xsl:value-of select="concat(name(), ' ')"/>
               </xsl:when>
               <xsl:otherwise>
                 <xsl:attribute name="id">
                   <xsl:value-of select="concat('_2TO3_', ../@id, '-meta-',
                                                $Replacement/@with)"/>
                 </xsl:attribute>
                 <xsl:attribute name="name">
                   <xsl:value-of select="$Replacement/@with"/>
                 </xsl:attribute>
                 <xsl:attribute name="value">
                   <xsl:value-of select="."/>
                 </xsl:attribute>
               </xsl:otherwise>
             </xsl:choose>
           </xsl:if>
         </xsl:when>
         <xsl:when test="$InverseMode"/>
         <xsl:when test="$Replacement
                         and
                         (
                           not(string($Replacement/@with))
                           or
                           $Replacement/@where
                         )">
           <!-- drop (possibly just move over) -->
         </xsl:when>
         <xsl:when test="$Replacement">
           <xsl:message terminate="yes">
             <xsl:value-of select="concat('INTERNAL ERROR: ',
                                          $Replacement/../@msg-prefix,
                                          ': no in-situ rename',
                                          ' does not hold')"/>
           </xsl:message>
         </xsl:when>
         <xsl:otherwise>
           <xsl:copy/>
         </xsl:otherwise>
       </xsl:choose>
     </xsl:for-each>
     <!-- E: special-casing @* -->
 
     <xsl:if test="not($InverseMode)">
       <!-- Look ahead if there are any meta-like instance_attibutes to
            be propagated next door, into existing/new meta_attributes -->
       <xsl:variable name="ProcessedInverseNonruleOpInstanceAttributes">
         <xsl:for-each select="instance_attributes[not(rule)]">
           <xsl:call-template name="cibtr:ProcessOpInstanceAttributes">
             <xsl:with-param name="Source" select="."/>
             <xsl:with-param name="InnerSimulation" select="true()"/>
             <xsl:with-param name="InverseMode" select="true()"/>
             <xsl:with-param name="InnerPass"
                             select="substring-after(
                                       concat(
                                         string($InnerSimulation),
                                         'TRIGGER-MSG'
                                       ),
                                      'true'
                                     )"/>
           </xsl:call-template>
         </xsl:for-each>
       </xsl:variable>
       <!-- B: special-casing instance_attributes|meta_attributes -->
       <xsl:for-each select="$Source/node()">
         <xsl:choose>
           <xsl:when test="self::text()">
             <!-- cf. trick A. (consideration 1.) -->
             <xsl:choose>
               <xsl:when test="normalize-space($InnerPass)
                               != $InnerPass
                               and
                               (
                                 not(following-sibling::nvpair)
                                 or
                                 generate-id(following-sibling::nvpair[1])
                                 != generate-id(following-sibling::*[1])
                               )">
                 <xsl:value-of select="."/>
               </xsl:when>
               <xsl:otherwise>
                 <xsl:value-of select="normalize-space(.)"/>
               </xsl:otherwise>
             </xsl:choose>
           </xsl:when>
           <xsl:when test="self::instance_attributes">
             <xsl:variable name="ProcessedOpInstanceAttributes">
               <xsl:call-template name="cibtr:ProcessOpInstanceAttributes">
                 <xsl:with-param name="Source" select="."/>
                 <xsl:with-param name="InnerSimulation" select="true()"/>
               </xsl:call-template>
             </xsl:variable>
             <!-- cf. trick A. -->
             <xsl:if test="normalize-space($ProcessedOpInstanceAttributes)
                           != $ProcessedOpInstanceAttributes">
               <xsl:copy>
                 <xsl:apply-templates select="@*"
                                      mode="cibtr:main"/>
                 <xsl:call-template name="cibtr:ProcessOpInstanceAttributes">
                   <xsl:with-param name="Source" select="."/>
                   <xsl:with-param name="InnerSimulation" select="$InnerSimulation"/>
                   <!-- cf. trick E. -->
                   <xsl:with-param name="InnerPass" select="$ProcessedOpInstanceAttributes"/>
                 </xsl:call-template>
               </xsl:copy>
             </xsl:if>
           </xsl:when>
           <xsl:when test="self::meta_attributes">
             <xsl:variable name="ProcessedOpMetaAttributes">
               <xsl:call-template name="cibtr:ProcessNonattrOpMetaAttributes">
                 <xsl:with-param name="Source" select="."/>
                 <xsl:with-param name="InnerSimulation" select="true()"/>
                 <xsl:with-param name="InnerPass"
                                 select="substring-after(
                                           concat(
                                             string($InnerSimulation),
                                             'TRIGGER-MSG'
                                           ),
                                          'true'
                                         )"/>
               </xsl:call-template>
             </xsl:variable>
             <!-- cf. trick A.;
                  possibly piggy-back instance_attributes (if any per
                  above look ahead) to first suitable (not rules-driven)
                  meta_attributes set... -->
             <xsl:if test="normalize-space($ProcessedOpMetaAttributes)
                           != $ProcessedOpMetaAttributes
                           or
                           (
                             not(rule)
                             and
                             not(preceding-sibling::meta_attributes[not(rule)])
                             and
                             normalize-space($ProcessedInverseNonruleOpInstanceAttributes)
                             != $ProcessedInverseNonruleOpInstanceAttributes
                           )">
               <xsl:copy>
                 <xsl:apply-templates select="@*"
                                      mode="cibtr:main"/>
                 <xsl:if test="normalize-space($ProcessedOpMetaAttributes)
                               != $ProcessedOpMetaAttributes">
                   <xsl:call-template name="cibtr:ProcessNonattrOpMetaAttributes">
                     <xsl:with-param name="Source" select="."/>
                     <xsl:with-param name="InnerSimulation" select="$InnerSimulation"/>
                     <!-- cf. trick E. -->
                     <xsl:with-param name="InnerPass" select="$ProcessedOpMetaAttributes"/>
                   </xsl:call-template>
                 </xsl:if>
                 <xsl:if test="not(rule)
                               and
                               not(preceding-sibling::meta_attributes[not(rule)])
                               and
                               normalize-space($ProcessedInverseNonruleOpInstanceAttributes)
                               != $ProcessedInverseNonruleOpInstanceAttributes">
                   <xsl:for-each select="../instance_attributes[not(rule)]">
                     <xsl:call-template name="cibtr:ProcessOpInstanceAttributes">
                       <xsl:with-param name="Source" select="."/>
                       <xsl:with-param name="InnerSimulation" select="$InnerSimulation"/>
                       <xsl:with-param name="InverseMode" select="true()"/>
                     </xsl:call-template>
                   </xsl:for-each>
                 </xsl:if>
               </xsl:copy>
             </xsl:if>
           </xsl:when>
           <xsl:otherwise>
             <xsl:call-template name="cibtr:HelperIdentity"/>
           </xsl:otherwise>
         </xsl:choose>
       </xsl:for-each>
       <!-- E: special-casing instance_attributes|meta_attributes -->
 
       <!-- ...or roll out brand new meta_attributes, first collectively
            for no-rules instances... -->
       <xsl:if test="not(meta_attributes[not(rule)])
                     and
                     normalize-space($ProcessedInverseNonruleOpInstanceAttributes)
                     != $ProcessedInverseNonruleOpInstanceAttributes">
         <meta_attributes id="{concat('_2TO3_', @id, '-meta')}">
           <xsl:for-each select="instance_attributes[not(rule)]">
             <xsl:call-template name="cibtr:ProcessOpInstanceAttributes">
               <xsl:with-param name="Source" select="."/>
               <xsl:with-param name="InnerSimulation" select="$InnerSimulation"/>
               <xsl:with-param name="InverseMode" select="true()"/>
             </xsl:call-template>
           </xsl:for-each>
           <xsl:apply-templates select="text()[position() = last()]"
                                mode="cibtr:main"/>
         </meta_attributes>
         <xsl:apply-templates select="text()[position() = last()]"
                              mode="cibtr:main"/>
       </xsl:if>
 
       <!-- ...then individually for rules-driven ones -->
       <xsl:for-each select="instance_attributes[rule]">
         <xsl:variable name="ProcessedInverseRuleOpInstanceAttributes">
           <xsl:call-template name="cibtr:ProcessOpInstanceAttributes">
             <xsl:with-param name="Source" select="."/>
             <xsl:with-param name="InnerSimulation" select="true()"/>
             <xsl:with-param name="InverseMode" select="true()"/>
             <xsl:with-param name="InnerPass"
                             select="substring-after(
                                       concat(
                                         string($InnerSimulation),
                                         'TRIGGER-MSG'
                                       ),
                                      'true'
                                     )"/>
           </xsl:call-template>
         </xsl:variable>
         <!-- cf. trick A. -->
         <xsl:if test="normalize-space($ProcessedInverseRuleOpInstanceAttributes)
                       != $ProcessedInverseRuleOpInstanceAttributes">
           <meta_attributes>
             <xsl:apply-templates select="@*[
                                            name() != 'id'
                                          ]"
                                  mode="cibtr:main"/>
             <xsl:attribute name='id'>
               <xsl:value-of select="concat('_2TO3_', @id)"/>
             </xsl:attribute>
             <xsl:apply-templates select="node()[
                                            name() != 'nvpair'
                                          ]"
                                  mode="cibtr:main"/>
             <xsl:call-template name="cibtr:ProcessOpInstanceAttributes">
               <xsl:with-param name="Source" select="."/>
               <xsl:with-param name="InverseMode" select="true()"/>
               <!-- cf. trick E. -->
               <xsl:with-param name="InnerPass" select="$ProcessedInverseRuleOpInstanceAttributes"/>
             </xsl:call-template>
             <xsl:apply-templates select="text()[position() = last()]"
                                  mode="cibtr:main"/>
           </meta_attributes>
         </xsl:if>
       </xsl:for-each>
     </xsl:if>
     </xsl:element>
   </xsl:if>
 </xsl:template>
 
 <!--
  Source ctxt:    configuration
  Target ctxt:    {op,rsc}_defaults/meta_attributes [per $Variant, see below]
  Target-inv ctxt:N/A
  Dependencies:   ProcessClusterProperties
 
  Variant:        'op_defaults' | 'rsc_defaults'
  -->
 <xsl:template name="cibtr:ProcessDefaultsNonruleClusterProperties">
   <xsl:param name="Source"/>
   <xsl:param name="Variant"/>
   <xsl:param name="InnerSimulation" select="false()"/>
   <xsl:param name="InnerPass">
     <xsl:choose>
       <xsl:when test="$InnerSimulation">
         <xsl:value-of select="''"/>
       </xsl:when>
       <xsl:otherwise>
         <xsl:call-template name="cibtr:ProcessDefaultsNonruleClusterProperties">
           <xsl:with-param name="Source" select="$Source"/>
           <xsl:with-param name="Variant" select="$Variant"/>
           <xsl:with-param name="InnerSimulation" select="true()"/>
         </xsl:call-template>
       </xsl:otherwise>
     </xsl:choose>
   </xsl:param>
 
   <xsl:choose>
     <xsl:when test="$Source/*[name() = $Variant]/meta_attributes[
-                      not(@id-ref)
-                      and
                       not(rule)
                     ]">
       <xsl:call-template name="cibtr:ProcessClusterProperties">
         <xsl:with-param name="Source"
                         select="$Source/crm_config/cluster_property_set[
-                                  not(@id-ref)
-                                  and
                                   not(rule)
                                 ]"/>
         <xsl:with-param name="InverseMode"
                         select="$Source/*[name() = $Variant]/meta_attributes[
-                                  not(@id-ref)
-                                  and
                                   not(rule)
                                 ]"/>
         <xsl:with-param name="InnerSimulation" select="$InnerSimulation"/>
       </xsl:call-template>
     </xsl:when>
     <xsl:otherwise>
       <xsl:call-template name="cibtr:ProcessClusterProperties">
         <xsl:with-param name="Source"
                       select="$Source/crm_config/cluster_property_set[
-                                  not(@id-ref)
-                                  and
                                   not(rule)
                                 ]"/>
         <xsl:with-param name="InverseMode"
                         select="$Variant"/>
         <xsl:with-param name="InnerSimulation" select="$InnerSimulation"/>
       </xsl:call-template>
     </xsl:otherwise>
   </xsl:choose>
 </xsl:template>
 
 <!--
  Source ctxt:    configuration
  Target ctxt:    {op,rsc}_defaults/meta_attributes [per $Variant, see below]
  Target-inv ctxt:N/A
  Dependencies:   ProcessClusterProperties
 
  Variant:        'op_defaults' | 'rsc_defaults'
  -->
 <xsl:template name="cibtr:ProcessDefaultsRuleClusterProperties">
   <xsl:param name="Source"/>
   <xsl:param name="Variant"/>
   <xsl:param name="InnerSimulation" select="false()"/>
   <xsl:param name="InnerPass">
     <xsl:choose>
       <xsl:when test="$InnerSimulation">
         <xsl:value-of select="''"/>
       </xsl:when>
       <xsl:otherwise>
         <xsl:call-template name="cibtr:ProcessDefaultsRuleClusterProperties">
           <xsl:with-param name="Source" select="$Source"/>
           <xsl:with-param name="Variant" select="$Variant"/>
           <xsl:with-param name="InnerSimulation" select="true()"/>
         </xsl:call-template>
       </xsl:otherwise>
     </xsl:choose>
   </xsl:param>
 
   <xsl:for-each select="crm_config/cluster_property_set[
-                          not(@id-ref)
-                          and
                           rule
                         ]">
     <xsl:variable name="ProcessedPartial">
       <xsl:call-template name="cibtr:ProcessClusterProperties">
         <xsl:with-param name="Source" select="$Source"/>
         <xsl:with-param name="InverseMode" select="$Variant"/>
         <xsl:with-param name="InnerSimulation" select="true()"/>
         <xsl:with-param name="InnerPass" select="'TRIGGER-MSG'"/>
       </xsl:call-template>
     </xsl:variable>
     <xsl:if test="normalize-space($ProcessedPartial)
                   != $ProcessedPartial">
       <meta_attributes id="{concat('_2TO3_', @id)}">
         <xsl-copy-of select="rule"/>
         <xsl:call-template name="cibtr:ProcessClusterProperties">
           <xsl:with-param name="Source" select="$Source"/>
           <xsl:with-param name="InverseMode" select="$Variant"/>
         </xsl:call-template>
       </meta_attributes>
     </xsl:if>
   </xsl:for-each>
 </xsl:template>
 
 <!--
 
  ACTUAL TRANSFORMATION
 
  -->
 
 <xsl:template match="cib" mode="cibtr:main">
   <xsl:copy>
     <xsl:apply-templates select="@*"
                          mode="cibtr:main"/>
     <xsl:attribute name="validate-with">
       <xsl:value-of select="concat('pacemaker-', $cibtr:cib-min-ver)"/>
     </xsl:attribute>
     <xsl:apply-templates select="node()"
                          mode="cibtr:main"/>
   </xsl:copy>
 </xsl:template>
 
 <xsl:template match="cluster_property_set" mode="cibtr:main">
   <xsl:variable name="ProcessedClusterProperties">
     <xsl:call-template name="cibtr:ProcessClusterProperties">
       <xsl:with-param name="Source" select="."/>
       <xsl:with-param name="InnerSimulation" select="true()"/>
       <xsl:with-param name="InnerPass" select="'TRIGGER-MSG'"/>
     </xsl:call-template>
   </xsl:variable>
   <xsl:if test="normalize-space($ProcessedClusterProperties)
                 != $ProcessedClusterProperties">
     <xsl:copy>
       <xsl:apply-templates select="@*"
                            mode="cibtr:main"/>
       <xsl:call-template name="cibtr:ProcessClusterProperties">
         <xsl:with-param name="Source" select="."/>
         <!-- cf. trick E. -->
         <xsl:with-param name="InnerPass" select="$ProcessedClusterProperties"/>
       </xsl:call-template>
     </xsl:copy>
   </xsl:if>
 </xsl:template>
 
 <xsl:template match="rsc_colocation" mode="cibtr:main">
   <xsl:copy>
     <xsl:for-each select="@*">
       <xsl:variable name="Replacement"
                     select="$cibtr:MapConstraintsColocation/cibtr:replace[
                               @what = name(current())
                             ]"/>
       <xsl:call-template name="cibtr:MapMsg">
         <xsl:with-param name="Context" select="../@id"/>
         <xsl:with-param name="Replacement" select="$Replacement"/>
       </xsl:call-template>
       <xsl:choose>
         <xsl:when test="$Replacement
                         and
                         not(string($Replacement/@with))">
           <!-- drop -->
         </xsl:when>
         <xsl:when test="$Replacement">
           <!-- rename -->
           <xsl:attribute name="{name()}">
             <xsl:value-of select="$Replacement/@with"/>
           </xsl:attribute>
         </xsl:when>
         <xsl:otherwise>
           <xsl:copy/>
         </xsl:otherwise>
       </xsl:choose>
     </xsl:for-each>
     <xsl:apply-templates select="node()"
                          mode="cibtr:main"/>
   </xsl:copy>
 </xsl:template>
 
 <xsl:template match="node" mode="cibtr:main">
   <xsl:copy>
     <xsl:for-each select="@*">
       <xsl:variable name="Replacement"
                     select="$cibtr:MapClusterNode/cibtr:replace[
                               @what = name(current())
                               and
                               (
                                 (
                                   @in-case-of
                                   and
                                   contains(concat('|', @in-case-of, '|'),
                                            concat('|', current(), '|'))
                                 )
                                 or
                                 (
                                   not(@in-case-of)
                                   and
                                   not(
                                     $cibtr:MapClusterNode/cibtr:replace[
                                       @what = name(current())
                                       and
                                       @in-case-of
                                       and
                                       contains(concat('|', @in-case-of, '|'),
                                                concat('|', current(), '|'))
                                     ]
                                   )
                                 )
                               )
                             ]"/>
       <xsl:call-template name="cibtr:MapMsg">
         <xsl:with-param name="Context" select="concat(../@uname, ' (id=', ../@id, ')')"/>
         <xsl:with-param name="Replacement" select="$Replacement"/>
       </xsl:call-template>
       <xsl:choose>
         <xsl:when test="$Replacement
                         and
                         not(string($Replacement/@with))">
           <!-- drop -->
         </xsl:when>
         <xsl:when test="$Replacement">
           <!-- rename -->
           <xsl:attribute name="{$Replacement/@with}">
             <xsl:choose>
               <xsl:when test="$Replacement/@redefined-as">
                 <xsl:value-of select="$Replacement/@redefined-as"/>
               </xsl:when>
               <xsl:otherwise>
                 <xsl:value-of select="."/>
               </xsl:otherwise>
             </xsl:choose>
           </xsl:attribute>
         </xsl:when>
         <xsl:otherwise>
           <xsl:copy/>
         </xsl:otherwise>
       </xsl:choose>
     </xsl:for-each>
     <xsl:apply-templates select="node()"
                          mode="cibtr:main"/>
   </xsl:copy>
 </xsl:template>
 
 <!--
  1a. propagate (primitive|template)/operations/
        op[name() = 'start' or name() = 'promote']/@requires
      under new ./meta_attributes/nvpair
 
  1b. "move" (primitive|template)/operations/
        op[name() = 'start' or name() = 'promote']/
        meta_attributes/nvpair[@requires]
      under ./meta_attributes
 
   otherwise, just
 
  2a.  drop (primitive|template)/operations/
         op/@requires
 
  2b.  drop (primitive|template)/operations/
         op/meta_attributes/nvpair[@requires]
-
- Not compatible with meta_attributes referenced via id-ref
- (would need external preprocessing).
  -->
 <xsl:template match="primitive|template" mode="cibtr:main">
   <xsl:copy>
     <xsl:apply-templates select="@*"
                          mode="cibtr:main"/>
     <!-- B: special-casing operations|instance_attributes|meta_attributes -->
     <xsl:for-each select="node()">
       <xsl:choose>
         <xsl:when test="self::operations">
           <xsl:copy>
             <xsl:apply-templates select="@*"
                                  mode="cibtr:main"/>
             <!-- B: special-casing op -->
             <xsl:for-each select="node()">
               <xsl:choose>
                 <xsl:when test="self::op">
                   <!-- process @*|meta_attributes/nvpair
                        (keep/drop/move elsewhere) -->
                   <xsl:call-template name="cibtr:ProcessAttrOpMetaAttributes">
                     <xsl:with-param name="Source" select="."/>
                   </xsl:call-template>
                 </xsl:when>
                 <xsl:otherwise>
                   <xsl:call-template name="cibtr:HelperIdentity"/>
                 </xsl:otherwise>
               </xsl:choose>
             </xsl:for-each>
             <!-- E: special-casing op -->
           </xsl:copy>
         </xsl:when>
         <xsl:when test="self::instance_attributes">
           <xsl:variable name="ProcessedRscInstanceAttributes">
             <xsl:call-template name="cibtr:ProcessRscInstanceAttributes">
               <xsl:with-param name="Source" select="."/>
               <xsl:with-param name="InnerSimulation" select="true()"/>
               <xsl:with-param name="InnerPass" select="'TRIGGER-MSG'"/>
             </xsl:call-template>
           </xsl:variable>
           <!-- cf. trick A. -->
           <xsl:if test="normalize-space($ProcessedRscInstanceAttributes)
                         != $ProcessedRscInstanceAttributes">
             <xsl:copy>
               <xsl:apply-templates select="@*"
                                    mode="cibtr:main"/>
               <xsl:call-template name="cibtr:ProcessRscInstanceAttributes">
                 <xsl:with-param name="Source" select="."/>
                 <!-- cf. trick E. -->
                 <xsl:with-param name="InnerPass" select="$ProcessedRscInstanceAttributes"/>
               </xsl:call-template>
             </xsl:copy>
           </xsl:if>
         </xsl:when>
         <xsl:when test="self::meta_attributes">
           <xsl:variable name="ProcessedRscMetaAttributes">
             <xsl:call-template name="cibtr:ProcessRscMetaAttributes">
               <xsl:with-param name="Source" select="."/>
               <xsl:with-param name="InnerSimulation" select="true()"/>
               <xsl:with-param name="InnerPass" select="'TRIGGER-MSG'"/>
             </xsl:call-template>
           </xsl:variable>
           <!-- cf. trick A. -->
           <xsl:if test="normalize-space($ProcessedRscMetaAttributes)
                         != $ProcessedRscMetaAttributes">
             <xsl:copy>
               <xsl:apply-templates select="@*"
                                    mode="cibtr:main"/>
               <xsl:call-template name="cibtr:ProcessRscMetaAttributes">
                 <xsl:with-param name="Source" select="."/>
                 <!-- cf. trick E. -->
                 <xsl:with-param name="InnerPass" select="$ProcessedRscMetaAttributes"/>
               </xsl:call-template>
             </xsl:copy>
           </xsl:if>
         </xsl:when>
         <xsl:otherwise>
           <xsl:call-template name="cibtr:HelperIdentity"/>
         </xsl:otherwise>
       </xsl:choose>
     </xsl:for-each>
     <!-- E: special-casing operations|instance_attributes|meta_attributes -->
 
     <!-- add as last meta_attributes block... -->
 
     <!-- ...indirectly from op attributes -->
     <xsl:variable name="ToPropagateFromOp">
       <xsl:for-each select="operations/op">
         <xsl:call-template name="cibtr:ProcessAttrOpMetaAttributes">
           <xsl:with-param name="Source" select="."/>
           <xsl:with-param name="InverseMode" select="true()"/>
           <xsl:with-param name="InnerSimulation" select="true()"/>
           <xsl:with-param name="InnerPass" select="'TRIGGER-MSG'"/>
         </xsl:call-template>
       </xsl:for-each>
     </xsl:variable>
     <!-- cf. trick A. -->
     <xsl:if test="normalize-space($ToPropagateFromOp)
                   != $ToPropagateFromOp">
       <meta_attributes id="{concat('_2TO3_', @id, '-meta')}">
         <xsl:for-each select="operations/op">
           <xsl:call-template name="cibtr:ProcessAttrOpMetaAttributes">
             <xsl:with-param name="Source" select="."/>
             <xsl:with-param name="InverseMode" select="true()"/>
           </xsl:call-template>
         </xsl:for-each>
         <xsl:apply-templates select="text()[position() = last()]"
                              mode="cibtr:main"/>
       </meta_attributes>
       <xsl:apply-templates select="text()[position() = last()]"
                            mode="cibtr:main"/>
     </xsl:if>
 
     <!-- ...directly by picking existing nvpairs of
          meta_attributes|instance_attributes -->
     <xsl:for-each select="operations/op/meta_attributes
                           |operations/op/instance_attributes">
       <xsl:variable name="ProcessedOpMetaAttributes">
         <xsl:call-template name="cibtr:ProcessNonattrOpMetaAttributes">
           <xsl:with-param name="Source" select="."/>
           <xsl:with-param name="InverseMode" select="true()"/>
           <xsl:with-param name="InnerSimulation" select="true()"/>
         </xsl:call-template>
       </xsl:variable>
       <!-- cf. trick A. -->
       <xsl:if test="normalize-space($ProcessedOpMetaAttributes)
                     != $ProcessedOpMetaAttributes">
         <!-- cannot xsl:copy, need to settle on meta_attributes -->
         <meta_attributes>
           <xsl:apply-templates select="@*[
                                          name() != 'id'
                                        ]"
                                mode="cibtr:main"/>
           <xsl:attribute name='id'>
             <xsl:value-of select="concat('_2TO3_', @id)"/>
           </xsl:attribute>
           <xsl:apply-templates select="node()[
                                          name() != 'nvpair'
                                        ]"
                                mode="cibtr:main"/>
           <xsl:call-template name="cibtr:ProcessNonattrOpMetaAttributes">
             <xsl:with-param name="Source" select="."/>
             <xsl:with-param name="InverseMode" select="true()"/>
             <!-- cf. trick E. -->
             <xsl:with-param name="InnerPass" select="$ProcessedOpMetaAttributes"/>
           </xsl:call-template>
           <xsl:apply-templates select="text()[position() = last()]"
                                mode="cibtr:main"/>
         </meta_attributes>
         <xsl:apply-templates select="text()[position() = last()]"
                              mode="cibtr:main"/>
       </xsl:if>
     </xsl:for-each>
   </xsl:copy>
 </xsl:template>
 
 <xsl:template match="configuration" mode="cibtr:main">
   <xsl:variable name="Configuration" select="."/>
   <xsl:variable name="ProcessedOpDefaultsNonruleClusterProperties">
     <xsl:call-template name="cibtr:ProcessDefaultsNonruleClusterProperties">
       <xsl:with-param name="Source" select="$Configuration"/>
       <xsl:with-param name="Variant" select="'op_defaults'"/>
       <xsl:with-param name="InnerSimulation" select="true()"/>
     </xsl:call-template>
   </xsl:variable>
   <xsl:variable name="ProcessedRscDefaultsNonruleClusterProperties">
     <xsl:call-template name="cibtr:ProcessDefaultsNonruleClusterProperties">
       <xsl:with-param name="Source" select="$Configuration"/>
       <xsl:with-param name="Variant" select="'rsc_defaults'"/>
       <xsl:with-param name="InnerSimulation" select="true()"/>
     </xsl:call-template>
   </xsl:variable>
   <xsl:variable name="ProcessedOpDefaultsRuleClusterProperties">
     <xsl:call-template name="cibtr:ProcessDefaultsNonruleClusterProperties">
       <xsl:with-param name="Source" select="$Configuration"/>
       <xsl:with-param name="Variant" select="'op_defaults'"/>
       <xsl:with-param name="InnerSimulation" select="true()"/>
     </xsl:call-template>
   </xsl:variable>
   <xsl:variable name="ProcessedRscDefaultsRuleClusterProperties">
     <xsl:call-template name="cibtr:ProcessDefaultsNonruleClusterProperties">
       <xsl:with-param name="Source" select="$Configuration"/>
       <xsl:with-param name="Variant" select="'rsc_defaults'"/>
       <xsl:with-param name="InnerSimulation" select="true()"/>
     </xsl:call-template>
   </xsl:variable>
 
   <xsl:copy>
     <xsl:apply-templates select="@*"
                          mode="cibtr:main"/>
     <!-- B: special-casing {op,rsc}_defaults -->
     <xsl:for-each select="node()">
       <xsl:choose>
         <xsl:when test="self::op_defaults|self::rsc_defaults">
           <xsl:variable name="WhichDefaults" select="name()"/>
           <xsl:copy>
             <xsl:apply-templates select="@*"
                                  mode="cibtr:main"/>
             <!-- B: special-casing meta_attributes -->
             <xsl:for-each select="node()">
               <xsl:copy>
                 <xsl:choose>
                   <xsl:when test="self::meta_attributes[
-                                    not(@id-ref)
-                                    and
                                     not(rule)
                                     and
                                     not(
                                       preceding-sibling::meta_attributes[
-                                        not(@id-ref)
-                                        and
                                         not(rule)
                                       ]
                                     )
                                   ]">
                   <xsl:apply-templates select="@*|node()"
                                        mode="cibtr:main"/>
                     <xsl:if test="$WhichDefaults = 'op_defaults'
                                   or
                                   $WhichDefaults = 'rsc_defaults'">
                       <xsl:call-template name="cibtr:ProcessDefaultsNonruleClusterProperties">
                         <xsl:with-param name="Source" select="$Configuration"/>
                         <xsl:with-param name="Variant" select="$WhichDefaults"/>
                       </xsl:call-template>
                     </xsl:if>
                   </xsl:when>
                   <xsl:otherwise>
                     <xsl:apply-templates select="@*|node()"
                                          mode="cibtr:main"/>
                   </xsl:otherwise>
                 </xsl:choose>
                 <xsl:if test="(
                                 $WhichDefaults = 'op_defaults'
                                 and
                                 normalize-space($ProcessedOpDefaultsRuleClusterProperties)
                                 != $ProcessedOpDefaultsRuleClusterProperties
                               )
                               or
                               (
                                 $WhichDefaults = 'rsc_defaults'
                                 and
                                 normalize-space($ProcessedRscDefaultsRuleClusterProperties)
                                 != $ProcessedRscDefaultsRuleClusterProperties
                               )">
                   <xsl:call-template name="cibtr:ProcessDefaultsRuleClusterProperties">
                     <xsl:with-param name="Source" select="$Configuration"/>
                     <xsl:with-param name="Variant" select="$WhichDefaults"/>
                   </xsl:call-template>
                 </xsl:if>
               </xsl:copy>
             </xsl:for-each>
             <!-- E: special-casing meta_attributes -->
           </xsl:copy>
         </xsl:when>
         <xsl:otherwise>
           <xsl:call-template name="cibtr:HelperIdentity"/>
         </xsl:otherwise>
       </xsl:choose>
     </xsl:for-each>
     <!-- E: special-casing {op,rsc}_defaults -->
     <xsl:if test="not(op_defaults)
                   and
                   (
                     normalize-space($ProcessedOpDefaultsNonruleClusterProperties)
                     != $ProcessedOpDefaultsNonruleClusterProperties
                     or
                     normalize-space($ProcessedOpDefaultsRuleClusterProperties)
                     != $ProcessedOpDefaultsRuleClusterProperties
                   )">
       <op_defaults>
         <xsl:if test="normalize-space($ProcessedOpDefaultsNonruleClusterProperties)
                       != $ProcessedOpDefaultsNonruleClusterProperties">
           <meta_attributes id="{concat('_2TO3_', '-op-defaults')}">
             <xsl:call-template name="cibtr:ProcessDefaultsNonruleClusterProperties">
               <xsl:with-param name="Source" select="$Configuration"/>
               <xsl:with-param name="Variant" select="'op_defaults'"/>
             </xsl:call-template>
           </meta_attributes>
         </xsl:if>
         <xsl:call-template name="cibtr:ProcessDefaultsRuleClusterProperties">
           <xsl:with-param name="Source" select="$Configuration"/>
           <xsl:with-param name="Variant" select="'op_defaults'"/>
         </xsl:call-template>
         <xsl:apply-templates select="text()[position() = last()]"
                              mode="cibtr:main"/>
       </op_defaults>
     </xsl:if>
     <xsl:if test="not(rsc_defaults)
                   and
                   (
                     normalize-space($ProcessedRscDefaultsNonruleClusterProperties)
                     != $ProcessedRscDefaultsNonruleClusterProperties
                     or
                     normalize-space($ProcessedRscDefaultsRuleClusterProperties)
                     != $ProcessedRscDefaultsRuleClusterProperties
                   )">
       <rsc_defaults>
         <xsl:if test="normalize-space($ProcessedRscDefaultsNonruleClusterProperties)
                       != $ProcessedRscDefaultsNonruleClusterProperties">
           <meta_attributes id="{concat('_2TO3_', '-rsc-defaults')}">
             <xsl:call-template name="cibtr:ProcessDefaultsNonruleClusterProperties">
               <xsl:with-param name="Source" select="$Configuration"/>
               <xsl:with-param name="Variant" select="'rsc_defaults'"/>
             </xsl:call-template>
           </meta_attributes>
         </xsl:if>
         <xsl:call-template name="cibtr:ProcessDefaultsRuleClusterProperties">
           <xsl:with-param name="Source" select="$Configuration"/>
           <xsl:with-param name="Variant" select="'rsc_defaults'"/>
         </xsl:call-template>
         <xsl:apply-templates select="text()[position() = last()]"
                              mode="cibtr:main"/>
       </rsc_defaults>
     </xsl:if>
   </xsl:copy>
 </xsl:template>
 
 <!-- used in test files to allow in-browser on-the-fly upgrade reports -->
 <xsl:template match="processing-instruction()[
                        name() = 'xml-stylesheet'
                        and
                        count(..|/) = 1
                      ]"
               mode="cibtr:main"/>
 
 <xsl:template match="@*|node()" mode="cibtr:main">
   <xsl:call-template name="cibtr:HelperIdentity"/>
 </xsl:template>
 
 <!-- mode-less, easy to override kick-off -->
 <xsl:template match="/">
   <xsl:call-template name="cibtr:HelperIdentity"/>
 </xsl:template>
 
 </xsl:stylesheet>