|DITA map files / Relationship tables|
The headings used to label generated related topic links in the output are based on the type attribute in the referencing topicref element.
Generated relationship links are typically grouped, in the output, by information type. For example, links may be grouped under Related Concepts, Related Tasks, and Related References headings.
In a typical transformation to an output format, the wording of these headings is drawn from the (information) type attribute of the topicref element. If the type is not specified in the topicref element, the information type is determined from the topic file itself. If the type is not a base information type (that is, not concept, task or reference), the link is generated under a heading of "Related Information" instead.
If a referenced topic is external to the current ditamap collection (that is, it has a scope attribute of external), or not available at build time (that is, it has a scope attribute of peer), and a type attribute is not specified in the topicref element, the link will be generated under a heading of "Related Topics".