<?xml version="1.0" encoding="UTF-8"?>
<grammar xmlns="http://relaxng.org/ns/structure/1.0">
  <define name="xproc10">
    <externalRef href="xproc10.rng"/>
  </define>
  <define name="xproc30">
    <externalRef href="xproc30.rng"/>
  </define>
  <define name="xproc31">
    <externalRef href="xproc31.rng"/>
  </define>
  <start>
    <choice>
      <ref name="xproc10"/>
      <ref name="xproc30"/>
      <ref name="xproc31"/>
    </choice>
  </start>
</grammar>
