<?xml version="1.0"?>
<pml_schema version="1.1"
xmlns="http://ufal.mff.cuni.cz/pdt/pml/schema/">
<description>Example of constituency tree annotation</description>
<root name="annotation">
<sequence role="#TREES" content_pattern="meta, nt+">
<element name="meta" type="meta.type"/>
<element name="nt" type="nonterminal.type"/>
</sequence>
</root>
<type name="meta.type">
<structure>
<member name="annotator"><cdata format="any"/></member>
<member name="datetime"><cdata format="any"/></member>
</structure>
</type>
<type name="nonterminal.type">
<container role="#NODE">
<attribute name="label" type="label.type"/>
<sequence role="#CHILDNODES">
<element name="nt" type="nonterminal.type"/>
<element name="form" type="terminal.type"/>
</sequence>
</container>
</type>
<type name="terminal.type">
<container role="#NODE">
<cdata format="any"/>
</container>
</type>
<type name="label.type">
<choice>
<value>S</value>
<value>VP</value>
<value>NP</value>
<value>PP</value>
<value>ADVP</value>
<!-- etc. -->
</choice>
</type>
</pml_schema>