1<?xml version="1.0" encoding="UTF-8"?>
2<grammar ns="" xmlns="http://relaxng.org/ns/structure/1.0">
3  <start>
4    <element name="t">
5      <ref name="tcont"/>
6    </element>
7  </start>
8  <define name="tcont">
9    <text/>
10  </define>
11</grammar>
12