Supporting foreign content vocabulary

In DITA 1.1, you can use the <unknown> element to incorporate existing standard vocabularies for special content, like MathML and SVG, as inline objects.
Note:
  • Because OASIS DITA 1.1 is not yet an approved standard as of the release of DITA OT 1.3, the functionality described here should be considered a preview capability.
  • The specification and the defined functions that need to be supported can change by the time OASIS formally approves DITA 1.1.

As an author, when you create DITA files, you can add the <unknown> element, and put content inside it. The <unknown> element and any content inside it is ignored when you transform the DITA files to your desired output.

As a specializer, when you specialize the <unknown> element, and then put information inside the specialized element, you can create a transform override that allows the information to appear correctly in the output.