<literal-xml> lets you define xml output directly and "literally" in the data-source definition file.<literal-xml> is not included in the data-source xml output. In the example above, the generated xml will be:${foo} equals "hello world", the data-source output will be:<application-introspection> and returns<directory name="x"> for any directory<file name="x"/> for all XML files. The content of the XML file is included as a child of this tag, except the directory xml-from-application. (Use the <xml-from-application> data source, not <application-introspection> to load content from such files.)<file name="x"/> for all non-XML files. In this case the content is not in any way included.*.xml does not in fact contain well-formed XML, this is an error.${foo} found in the file are not expanded in this type of content-source.