<?xml version="1.0" encoding="UTF-8"?>
<grammar ns="http://dblatex.sourceforge.net/config" xmlns="http://relaxng.org/ns/structure/1.0">
  <start>
    <ref name="config"/>
  </start>
  <define name="config">
    <element name="config">
      <optional>
        <attribute name="version"/>
      </optional>
      <zeroOrMore>
        <choice>
          <ref name="latex"/>
          <ref name="xslt"/>
          <ref name="imagedata"/>
          <ref name="options"/>
        </choice>
      </zeroOrMore>
    </element>
  </define>
  <!--
    <latex> element and children syntaxes 
    
  -->
  <define name="latex">
    <element name="latex">
      <empty/>
      <zeroOrMore>
        <choice>
          <ref name="texinputs"/>
          <ref name="bibinputs"/>
          <ref name="bstinputs"/>
          <ref name="backend"/>
          <ref name="texstyle"/>
          <ref name="texpost"/>
          <ref name="indexstyle"/>
        </choice>
      </zeroOrMore>
    </element>
  </define>
  <define name="attlist.modname">
    <attribute name="use"/>
  </define>
  <define name="attlist.filepath">
    <attribute name="fileref"/>
  </define>
  <define name="attlist.mod_or_file">
    <choice>
      <ref name="attlist.modname"/>
      <ref name="attlist.filepath"/>
    </choice>
  </define>
  <define name="backend">
    <element name="backend">
      <ref name="attlist.modname"/>
      <empty/>
    </element>
  </define>
  <define name="texstyle">
    <element name="texstyle">
      <ref name="attlist.mod_or_file"/>
      <empty/>
    </element>
  </define>
  <define name="texpost">
    <element name="texpost">
      <ref name="attlist.mod_or_file"/>
      <empty/>
    </element>
  </define>
  <define name="indexstyle">
    <element name="indexstyle">
      <ref name="attlist.filepath"/>
      <empty/>
    </element>
  </define>
  <define name="texinputs">
    <element name="texinputs">
      <text/>
    </element>
  </define>
  <define name="bibinputs">
    <element name="bibinputs">
      <text/>
    </element>
  </define>
  <define name="bstinputs">
    <element name="bstinputs">
      <text/>
    </element>
  </define>
  <!--
    <xslt> element and children syntaxes 
    
  -->
  <define name="xslt">
    <element name="xslt">
      <zeroOrMore>
        <choice>
          <ref name="stylesheet"/>
          <ref name="engine"/>
        </choice>
      </zeroOrMore>
    </element>
  </define>
  <define name="stylesheet">
    <element name="stylesheet">
      <ref name="attlist.filepath"/>
      <empty/>
    </element>
  </define>
  <define name="engine">
    <element name="engine">
      <ref name="attlist.engine"/>
      <optional>
        <choice>
          <ref name="commandchain"/>
          <ref name="command"/>
        </choice>
      </optional>
    </element>
  </define>
  <define name="attlist.engine">
    <choice>
      <ref name="attlist.modname"/>
      <attribute name="param-format"/>
    </choice>
  </define>
  <!--
    <imagedata> element and children syntaxes 
    
  -->
  <define name="imagedata">
    <element name="imagedata">
      <zeroOrMore>
        <choice>
          <ref name="figpath"/>
          <ref name="figformat"/>
          <ref name="formatrule"/>
          <ref name="converter"/>
        </choice>
      </zeroOrMore>
    </element>
  </define>
  <define name="figpath">
    <element name="figpath">
      <ref name="attlist.filepath"/>
      <empty/>
    </element>
  </define>
  <define name="figformat">
    <element name="figformat">
      <text/>
    </element>
  </define>
  <define name="formatrule">
    <element name="formatrule">
      <ref name="attlist.formatrule"/>
      <empty/>
    </element>
  </define>
  <define name="attlist.formatrule">
    <optional>
      <attribute name="dst"/>
    </optional>
    <optional>
      <attribute name="docformat">
        <choice>
          <value>dvi</value>
          <value>ps</value>
          <value>pdf</value>
          <value>*</value>
        </choice>
      </attribute>
    </optional>
    <optional>
      <attribute name="backend"/>
    </optional>
  </define>
  <define name="converter">
    <element name="converter">
      <ref name="attlist.converter"/>
      <choice>
        <ref name="commandchain"/>
        <ref name="command"/>
      </choice>
    </element>
  </define>
  <define name="attlist.converter">
    <optional>
      <attribute name="src"/>
    </optional>
    <optional>
      <attribute name="dst"/>
    </optional>
    <optional>
      <attribute name="docformat">
        <choice>
          <value>dvi</value>
          <value>ps</value>
          <value>pdf</value>
          <value>*</value>
        </choice>
      </attribute>
    </optional>
    <optional>
      <attribute name="backend"/>
    </optional>
  </define>
  <!--
    General <command> syntax
    
  -->
  <define name="commandchain">
    <element name="commandchain">
      <oneOrMore>
        <ref name="command"/>
      </oneOrMore>
    </element>
  </define>
  <define name="command">
    <element name="command">
      <ref name="attlist.command"/>
      <text/>
    </element>
  </define>
  <define name="attlist.command">
    <optional>
      <attribute name="input"/>
    </optional>
    <optional>
      <attribute name="output"/>
    </optional>
    <optional>
      <attribute name="shell">
        <choice>
          <value>0</value>
          <value>1</value>
          <value>false</value>
          <value>true</value>
        </choice>
      </attribute>
    </optional>
  </define>
  <!--
    <options> syntax
    
  -->
  <define name="options">
    <element name="options">
      <text/>
    </element>
  </define>
</grammar>