Example for a XML grammar file

<?xml version="1.0" encoding="ASCII"?>
<grammar xmlns="http://chaperon.sourceforge.net/schema/grammar/2.0" start="E">
  <definition name="F">
    <choice>
      <one-or-more>
        <class>
          <interval>
            <char value="0"/>
            <char value="9"/>
          </interval>
        </class>
      </one-or-more>
      <sequence>
        <char value="("/>
        <element name="ws"/>
        <element name="E"/>
        <element name="ws"/>
        <char value=")"/>
      </sequence>
    </choice>
  </definition>
  <definition name="T">
    <sequence>
      <element name="F"/>
      <zero-or-more>
        <sequence>
          <element name="ws"/>
          <char value="*"/>
          <element name="ws"/>
          <element name="F"/>
        </sequence>
      </zero-or-more>
    </sequence>
  </definition>
  <definition name="E">
    <sequence>
      <element name="T"/>
      <zero-or-more>
        <sequence>
          <element name="ws"/>
          <char value="+"/>
          <element name="ws"/>
          <element name="T"/>
        </sequence>
      </zero-or-more>
    </sequence>
  </definition>
  <definition name="ws">
    <zero-or-more>
      <class>
        <char value=" "/>
        <char value="#9"/>
        <char value="#13"/>
        <char value="#10"/>
      </class>
    </zero-or-more>
  </definition>
</grammar>