/usr/share/sphinx/themes/basic/opensearch.xml

This file is indexed.

/usr/share/sphinx/themes/basic/opensearch.xml is in sphinx-common 1.6.7-1ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

<?xml version="1.0" encoding="UTF-8"?>
<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/">
  <ShortName>{{ project|e }}</ShortName>
  <Description>{% trans docstitle=docstitle|e %}Search {{ docstitle }}{% endtrans %}</Description>
  <InputEncoding>utf-8</InputEncoding>
  <Url type="text/html" method="get"
       template="{{ use_opensearch }}/{{ pathto('search') }}?q={searchTerms}&amp;check_keywords=yes&amp;area=default"/>
  <LongName>{{ docstitle|e }}</LongName>
{% block extra %} {# Put e.g. an <Image> element here. #} {% endblock %}
</OpenSearchDescription>

sphinx-common 1.6.7-1ubuntu1 / usr / share / sphinx / themes / basic / opensearch.xml