Remove redundant head.
<?xml version="1.0" encoding="UTF-8"?>
<build>
<config name="test_spec" abstract="true">
<set name="A" value="foo"/>
<set name="B" value="parent: ${A}"/>
<!-- 0 -->
<config>
<set name="B" value="child -> ${A}"/>
<set name="C" value="missing value test ${does_not_exist}"/>
<set name="node.content">
This is the value!
</set>
</config>
<!-- 1 -->
<config>
<set name="C" value="one"/>
<set name="C" value="two"/>
</config>
<!-- 2 -->
<config/>
<!-- 3 -->
<config name="spec.with.type" type="test.type"/>
<!-- 4 -->
<config>
<append name="A" value="bar"/>
</config>
<!-- 5 -->
<config name="parent">
<set name="template" value="value -> ${my.value}"/>
<set name="my.value" value="from parent"/>
<config name="child">
<set name="my.value" value="from child"/>
</config>
</config>
<!-- 6 -->
<config name="spec.with.type2" type="test.type"/>
</config>
<config name="test_list" abstract="true">
<append name="include" value="foo_${custom.property}"/>
<config abstract="true">
<append name="include" value="bar1_${custom.property}"/>
<set name="include" value="bar2_${custom.property}"/>
<config name="test_list_config1">
<set name="custom.property" value="config1"/>
</config>
<config name="test_list_config2">
<set name="custom.property" value="config2"/>
</config>
</config>
</config>
</build>