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<?xml version="1.0" encoding="UTF-8"?>
<!--
    Comps file Relax-NG Schema

TODO: re-add namespace to this file
          use that namespace to comps.xml files
          create grammar for comps.xml.in
          add more documentation for comps elements
-->
<grammar xmlns="http://relaxng.org/ns/structure/1.0" 
         xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" 
         datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
  <start>
    <ref name="comps"/>
  </start>
  <define name="comps">
    <element name="comps">
      <oneOrMore>
        <ref name="group"/>
      </oneOrMore>
      <zeroOrMore>
        <ref name="environment"/>
      </zeroOrMore>
      <zeroOrMore>
        <ref name="category"/>
      </zeroOrMore>
      <interleave>
        <optional>
          <ref name="whiteout"/>
        </optional>
        <optional>
          <ref name="blacklist"/>
        </optional>
        <optional>
          <ref name="langpacks"/>
        </optional>
      </interleave>
    </element>
  </define>
  <define name="group">
    <element name="group">
      
      <a:documentation>This defines a package group.</a:documentation>
      <interleave>
       <ref name="id"/>
       <optional>
         <element name="default" a:defaultValue="true">
           <a:documentation>Should the group be enabled by default?</a:documentation>
           <ref name="boolean"/>
         </element>
       </optional>
       <optional>
         <element name="uservisible" a:defaultValue="true">
           <a:documentation>Should the group be visible to users?</a:documentation>
           <ref name="boolean"/>
         </element>
       </optional>
       <optional>
         <element name="display_order">
           <ref name="positiveInteger"/>
         </element>
       </optional>
       <optional>
         <element name="langonly">
           <ref name="locale"/>
         </element>
       </optional>
       <optional>
         <ref name="groupreqlist"/>
       </optional>
       <ref name="packagelist"/>
      </interleave>
    </element>
  </define>
  <define name="groupreqlist">
    <a:documentation>
      Contains a list of other groups that this group requires.
      This element has been ignored by yum et. al. since 2005 and should
      therefore be considered deprecated.
    </a:documentation>
    <element name="grouplist">
      <oneOrMore>
        <ref name="groupreq"/>
      </oneOrMore>
      <zeroOrMore>
        <ref name="metapkg"/>
      </zeroOrMore>
    </element>
  </define>
  <define name="groupreq">
    <element name="groupreq">
      <ref name="groupname"/>
    </element>
  </define>
  <define name="metapkg">
    <element name="metapkg">
      <ref name="packagename"/>
      <optional>
        <attribute name="type">
          <choice>
            <value>mandatory</value>
            <value>default</value>
            <value>optional</value>
          </choice>
        </attribute>
      </optional>
    </element>
  </define>
  <define name="packagelist">
    <element name="packagelist">
      <zeroOrMore>
        <ref name="packagereq"/>
      </zeroOrMore>
    </element>
  </define>
  <define name="packagereq">
    <element name="packagereq">
      <choice>
        <optional>
          <attribute name="type" a:defaultValue="optional">
            <choice>
              <value>mandatory</value>
              <value>default</value>
              <value>optional</value>
            </choice>
          </attribute>
        </optional>
        <group>
          <attribute name="type" a:defaultValue="conditional">
            <choice>
              <value>conditional</value>
            </choice>
          </attribute>
          <attribute name="requires">
            <ref name="packagename"/>
          </attribute>
        </group>
      </choice>
      <optional>
        <attribute name="basearchonly" a:defaultValue="false">
          <ref name="boolean"/>
        </attribute>
      </optional>
      <optional>
        <attribute name="arch">
          <ref name="string"/>
        </attribute>
      </optional>
      <ref name="packagename"/>
    </element>
  </define>
  <define name="environment">
    <element name="environment">
      <interleave>
        <ref name="id"/>
        <optional>
          <element name="display_order">
            <ref name="positiveInteger"/>
          </element>
        </optional>
        <ref name="grouplist"/>
        <optional>
          <ref name="optionlist"/>
        </optional>
      </interleave>
    </element>
  </define>
  <define name="category">
    <element name="category">
      <interleave>
      <ref name="id"/>
      <optional>
        <element name="display_order">
          <ref name="positiveInteger"/>
        </element>
      </optional>
      <ref name="grouplist"/>
     </interleave>
    </element>
  </define>
  <define name="grouplist">
    <element name="grouplist">
      <oneOrMore>
        <ref name="groupid"/>
      </oneOrMore>
    </element>
  </define>
  <define name="optionlist">
    <element name="optionlist">
      <oneOrMore>
        <ref name="groupid"/>
      </oneOrMore>
    </element>
  </define>
  <define name="groupid">
    <element name="groupid">
      <ref name="string"/>
      <optional>
        <attribute name="default" a:defaultValue="false">
          <ref name="boolean"/>
        </attribute>
      </optional>
    </element>
  </define>
  <define name="id">
    <element name="id">
      <ref name="ID"/>
    </element>
    <choice>
      
      <group>
        <element name="_name">
          <ref name="string"/>
        </element>
        <element name="_description">
          <ref name="string"/>
        </element>
      </group>
      
      <group>
        <element name="name">
          <ref name="string"/>
        </element>
        <zeroOrMore>
          <element name="name">
            <attribute name="xml:lang">
              <ref name="locale"/>
            </attribute>
            <ref name="string"/>
          </element>
        </zeroOrMore>
        <element name="description">
          <ref name="string"/>
        </element>
        <zeroOrMore>
          <element name="description">
            <attribute name="xml:lang">
              <ref name="locale"/>
            </attribute>
            <ref name="string"/>
          </element>
        </zeroOrMore>
      </group>
    </choice>
  </define>
  <define name="langpacks">
    <a:documentation>
    The "langpacks" item is a list of package-to-langpack mappings used
    by the yum-langpacks plugin.

An example is:
     &lt;match name="foo" install="foo-lang-%s"&gt;
    When the 'foo' package is installed, the 'foo-lang-(language code)' package
    will be installed for any configured languages.
    </a:documentation>
    <element name="langpacks">
      <zeroOrMore>
        <element name="match">
          <attribute name="name">
            <ref name="string"/>
          </attribute>
          <attribute name="install">
            <ref name="string"/>
          </attribute>
        </element>
      </zeroOrMore>
    </element>
  </define>
  <define name="blacklist">
    <a:documentation>
    The "blacklist" is a list of packages that will be *removed* if found
    during an upgrade. Typically this is used to handle tricky upgrade cases
    that can't be modeled with existing RPM Obsoletes/Conflicts/etc.

Here's an example: In FC6, hal was a multilib package, but in F7 we split
    it into (non-multilib) hal and (multilib) hal-libs.
    So the system starts with hal.x86_64 and hal.i386 (for multilib compat).
    We want to upgrade to hal.x86_64 and hal-libs.x86_64, with hal-libs.i386
    for multilib. Upgrading hal.x86_64 will bring in hal-libs.x86_64, and
    upgrading hal.i386 brings in hal-libs.i386. Adding a blacklist item for
    'hal.i386' causes anaconda to remove the (now-unneeded) hal.i386, 
    which gives us the desired outcome.
    </a:documentation>
    <element name="blacklist">
      <zeroOrMore>
        <element name="package">
          <attribute name="name">
            <ref name="string"/>
          </attribute>
          <optional>
            <attribute name="arch">
              <ref name="string"/>
              <a:documentation>
                Arch to blacklist this package from. If unspecified, it will be
                blocked on all arches.
                
              </a:documentation>
            </attribute>
          </optional>
        </element>
      </zeroOrMore>
    </element>
  </define>
  <define name="whiteout">
    <a:documentation>
    The RPM "whiteout" list is used to by RPM to break dependency loops. 
    Each "ignoredep" element has two attributes - "package" and "requires" -
    which are both package names. While calculating dependencies, RPM will
    ignore any dependency that results in p requiring r.

This is used to keep upgrades from getting stuck on known dependency loops,
    like with mutually dependent packages (e.g. xinitrc and xorg-x11)

To feed this info to RPM, each item should be converted to a string of the
    form 'package>requires', and the RPM macro '_dependency_whiteout' should be
    filled with a (whitespace-separated) list of these items.
    </a:documentation>
    <element name="whiteout">
      <zeroOrMore>
        <element name="ignoredep">
          <attribute name="package">
            <ref name="string"/>
          </attribute>
          <attribute name="requires">
            <ref name="string"/>
          </attribute>
        </element>
      </zeroOrMore>
    </element>
  </define>
  <define name="boolean">
    <choice>
      <value>true</value>
      <value>True</value>
      <value>false</value>
      <value>False</value>
    </choice>
  </define>
  <define name="groupname">
    <data type="string"/>
  </define>
  <define name="ID">
    <data type="string"/>
  </define>

  <define name="locale">
    <data type="string"/>
  </define>
  <define name="packagename">
    <data type="string"/>
  </define>
  <define name="positiveInteger">
    <data type="positiveInteger"/>
  </define>
  <define name="string">
    <data type="string"/>
  </define>
</grammar>

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