<?xml version="1.0" encoding="UTF-8"?>
<grammar xmlns:etd="http://components.ez.no/Tree/data" ns="http://components.ez.no/Tree" xmlns="http://relaxng.org/ns/structure/1.0" datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
  <start>
    <element name="tree">
      <ref name="node"/>
    </element>
  </start>
  <define name="node">
    <element name="node">
      <attribute name="id">
        <data type="integer"/>
      </attribute>
      <optional>
        <element name="etd:data">
          <text/>
        </element>
      </optional>
      <zeroOrMore>
        <ref name="node"/>
      </zeroOrMore>
    </element>
  </define>
</grammar>
