A document set is simply a set of related XML documents. These documents are related because they all contribute to the content of the same deliverable: PDF file, EPUB file, Web site, etc.
When XMLmind XML Editor knows that some opened documents are members of the same set:
it will more thoroughly check the links which may exist between these documents,
it will make it easier creating links between these documents.
Modular documents, for example a DITA map referencing a number of topics or a modular DocBook book including a number of chapters, implicitly specify a document set. When you author such modular documents, it is strongly recommended to first open their document set in XXE.
If your DITA topics make use of attributes conkeyref
and keyref
, then opening it as a document set becomes near mandatory. As a matter of fact, when a DITA map contains key definitions, then the corresponding document set acts not only as a link creation/validation context for its member topics, but it also acts as a key space.
When this is the case, please also take the time to review the options of document sets. See Section 5.7.2, “Document Set options”.