<?xml version="1.0" encoding="UTF-8"?>
<!--    Sample from Zvon XSLT tutorial (www.zvon.org)   -->
<source>
    <AAA id="a1" pos="start">
        <BBB id="b1"/>
        <BBB id="b2"/>
    </AAA>
    <AAA id="a2">
        <BBB id="b3"/>
        <BBB id="b4"/>
        <CCC id="c1">
            <CCC id="c2"/>
        </CCC>
        <BBB id="b5">
            <CCC id="c3"/>
        </BBB>
    </AAA>
</source>
