This file is indexed.

/usr/share/pacemaker/acls-2.0.rng is in pacemaker-common 1.1.14-2ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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<?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>
    <optional>
      <ref name="element-acls"/>
    </optional>
  </start>

  <define name="element-acls">
    <element name="acls">
      <zeroOrMore>
	<choice>
	  <element name="acl_target">
	    <attribute name="id"><text/></attribute>
	    <zeroOrMore>
 	      <element name="role">
		<attribute name="id"><data type="IDREF"/></attribute>
	      </element>
	    </zeroOrMore>
	  </element>
	  <element name="acl_group">
	    <!-- Here 'id' is the name of a unix group -->
	    <attribute name="id"><data type="ID"/></attribute>
	    <zeroOrMore>
 	      <element name="role">
		<attribute name="id"><data type="IDREF"/></attribute>
	      </element>
	    </zeroOrMore>
	  </element>
	  <element name="acl_role">
	    <attribute name="id"><data type="ID"/></attribute>
	    <optional>
	      <attribute name="description"><text/></attribute>
	    </optional>
	    <zeroOrMore>
	      <ref name="element-permission"/>
	    </zeroOrMore>
	  </element>
	</choice>
      </zeroOrMore>
    </element>
  </define>

  <define name="element-permission">
    <element name="acl_permission">
      <attribute name="id"><data type="ID"/></attribute>

      <attribute name="kind">
	<choice>
	  <value>read</value>
	  <value>write</value>
	  <value>deny</value>
	</choice>
      </attribute>

      <choice>
	<attribute name="xpath"><text/></attribute>
	<!-- reference is already sufficiently specific without 'object-type' --> 
	<attribute name="reference"><data type="IDREF"/></attribute>
	<group>
	  <!-- Use 'object-type' to avoid conflicting with the 'tag' configuration concept -->
	  <attribute name="object-type"><text/></attribute>
	  <optional>
	    <!-- 
		 does not make sense with anything other than object-type
		 xpath and reference are already sufficiently specific
	    -->
	    <attribute name="attribute"><text/></attribute>
	  </optional>
	</group>
      </choice>

      <optional>
	<attribute name="description"><text/></attribute>
      </optional>
    </element>
  </define>

</grammar>