Disposable header capability probe

source.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
  KUKA XML smoke-test document for the okf_xml@kuka filter config.
  Every text node is self-describing: it states whether it SHOULD or
  SHOULD NOT be extracted for translation, so results can be eyeballed.
  See smoke-test.md for the rule-by-rule expected-results table.
  A default namespace is set so the config's local-name() predicates
  are actually exercised.
-->
<document xmlns="http://www.kuka.com/documentation">

  <!-- title (top level): SHOULD translate -->
  <title>Operating Instructions [title SHOULD translate]</title>

  <!-- primary-index: SHOULD translate -->
  <primary-index>Safety [primary-index SHOULD translate]</primary-index>

  <!-- index + any descendant of index: SHOULD translate -->
  <index>
    Index intro text [index SHOULD translate]
    <entry>Nested index entry [index descendant SHOULD translate]</entry>
    <see-also>Related topics [index descendant SHOULD translate]</see-also>
  </index>

  <chapter>
    <!-- title (nested): SHOULD translate -->
    <title>Chapter 1: Installation [title SHOULD translate]</title>

    <!-- para + translatable inline children -->
    <para>This paragraph [para SHOULD translate] contains an
      <emphasis>emphasised phrase [emphasis inline SHOULD translate]</emphasis>, a
      <cite>citation [cite inline SHOULD translate]</cite>, a
      <command>runProgram() [command inline SHOULD translate]</command>, a superscript
      <sup>2 [sup inline SHOULD translate]</sup>, a subscript
      <sub>max [sub inline SHOULD translate]</sub>, and a
      <a href="https://www.kuka.com">link text [a inline SHOULD translate]</a>.
      It also embeds a
      <feature>FEATURE_CODE_42 [feature inline SHOULD NOT translate]</feature>
      and a line break [br SHOULD NOT translate]<br/>after the break.</para>

    <!-- target-content: SHOULD translate -->
    <target-content>Localised target string [target-content SHOULD translate]</target-content>

    <!-- emphasis (standalone, top of chapter): SHOULD translate -->
    <emphasis>Standalone emphasis [emphasis SHOULD translate]</emphasis>

    <!-- text outside notrans: SHOULD translate -->
    <text>Free-standing text element [text SHOULD translate]</text>

    <!-- notrans: everything under it SHOULD NOT translate -->
    <notrans>
      <text>Text inside notrans [text SHOULD NOT translate]</text>
      Bare text inside notrans [SHOULD NOT translate]
    </notrans>

    <!-- programlisting: ONLY descendants with @type='translate' translate -->
    <programlisting>
      <title>Listing title [inside programlisting SHOULD NOT translate]</title>
      <para>Listing paragraph [inside programlisting SHOULD NOT translate]</para>
      <line>PTP $POS_ACT  ; code line [SHOULD NOT translate]</line>
      <comment type="translate">Move robot to home position [programlisting @type=translate SHOULD translate]</comment>
      <comment>Untagged comment [inside programlisting SHOULD NOT translate]</comment>
    </programlisting>

  </chapter>
</document>