diff --git a/xml/api/stonith_admin-2.33.rng b/xml/api/stonith_admin-2.33.rng
new file mode 100644
index 0000000000..f3fab68f9c
--- /dev/null
+++ b/xml/api/stonith_admin-2.33.rng
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<grammar xmlns="http://relaxng.org/ns/structure/1.0"
+         datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
+
+    <start>
+        <ref name="element-stonith-admin"/>
+    </start>
+
+    <define name="element-stonith-admin">
+        <choice>
+            <ref name="stonith-admin-list" />
+            <ref name="element-last-fenced" />
+            <ref name="element-validation" />
+            <element name="metadata"> <text /> </element>
+        </choice>
+    </define>
+
+    <define name="stonith-admin-list">
+        <optional>
+            <element name="list">
+                <attribute name="name"> <text /> </attribute>
+                <attribute name="count"> <data type="nonNegativeInteger" /> </attribute>
+                <choice>
+                    <empty/>
+                    <oneOrMore>
+                        <externalRef href="item-1.1.rng"/>
+                    </oneOrMore>
+                    <oneOrMore>
+                        <externalRef href="fence-event-2.15.rng"/>
+                    </oneOrMore>
+                </choice>
+            </element>
+        </optional>
+    </define>
+
+    <define name="element-last-fenced">
+        <element name="last-fenced">
+            <attribute name="target"> <text /> </attribute>
+            <attribute name="when"> <text /> </attribute>
+        </element>
+    </define>
+
+    <define name="element-validation">
+        <element name="validate">
+            <attribute name="agent"> <text /> </attribute>
+            <attribute name="valid"> <data type="boolean" /> </attribute>
+            <optional>
+                <externalRef href="command-output-2.23.rng" />
+            </optional>
+        </element>
+    </define>
+</grammar>