Cross-referencing a ditamap
Cross-references to ditamaps should not be used, because DITA does not have a clear method for doing so, and the logic of linking to metadata is not strong.
Removing related links from the output
Related links can be removed from the output by setting the linking attribute of the topicref element in the ditamap to none. If you are producing HTML-based output, you can alternatively change the CSS class definition so that generated links are not displayed.
Conditions in cross-references
The standard DITA metadata attributes of audience, platform, product, and otherprops can be applied to xref elements to allow conditional processing of cross-references. Positioning cross-references at the end of a sentence makes it easier to exclude the cross-reference without affecting the sense of the sentence.