libvirt/docs/schemas/storagecommon.rng

<?xml version="1.0"?>
<!-- A Relax NG schema for common libvirt XML storage elements -->
<grammar xmlns="http://relaxng.org/ns/structure/1.0"
    datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">

  <!-- This schema is not designed for standalone use; another file
       must include both this file and basictypes.rng -->

  <define name='encryption'>
    <element name='encryption'>
      <attribute name='format'>
        <choice>
          <value>default</value>
          <value>qcow</value>
        </choice>
      </attribute>
      <zeroOrMore>
        <ref name='secret'/>
      </zeroOrMore>
    </element>
  </define>

  <define name='secret'>
    <element name='secret'>
      <attribute name='type'>
        <choice>
          <value>passphrase</value>
        </choice>
      </attribute>
      <attribute name='uuid'>
        <ref name="UUID"/>
      </attribute>
    </element>
  </define>

  <define name='compat'>
    <element name='compat'>
      <data type='string'>
        <param name='pattern'>[0-9]+\.[0-9]+</param>
      </data>
    </element>
  </define>
  <define name='fileFormatFeatures'>
    <element name='features'>
      <interleave>
        <optional>
          <element name='lazy_refcounts'>
            <empty/>
          </element>
        </optional>
      </interleave>
    </element>
  </define>

  <!-- split the list of known storage formats into two, those where
       we know how to follow backing chains, and all others -->
  <define name='storageFormatBacking'>
    <choice>
      <value>cow</value>
      <value>qcow</value>
      <value>qcow2</value>
      <value>qed</value>
      <value>vmdk</value>
    </choice>
  </define>
  <define name='storageFormat'>
    <choice>
      <value>raw</value>
      <value>dir</value>
      <value>bochs</value>
      <value>cloop</value>
      <value>dmg</value>
      <value>iso</value>
      <value>vpc</value>
      <value>vdi</value>
      <value>fat</value>
      <value>vhd</value>
      <ref name='storageFormatBacking'/>
    </choice>
  </define>

  <define name='storageStartupPolicy'>
    <!-- Use a combine='choice' override in client files that want to
         add additional attributes to a <source> sub-element
         associated with a storage source -->
    <notAllowed/>
  </define>

  <define name='storageSourceExtra'>
    <!-- Use a combine='choice' override in client files that want to
         add additional elements as siblings of a <source> sub-element
         associated with a storage source -->
    <notAllowed/>
  </define>

</grammar>