OASIS Darwin Information Typing Architecture (DITA) TC

The bookmap specialization is in general not usable for publications that do
not or cannot conform to the constraints imposed by the bookmap
specialization. This includes, many, if not most, publications produced by
publishers. These constraints include requirements/limitations in bookmap
metadata as well as constraints and requirements imposed by the bookmap
content structure model.

However, there is one element defined only in the bookmap specialization
that is potentially applicable to *any* publication, the 

Based on today's TC call, I said I would follow up with some comments on
the technical side of this.

Currently, ISBN is used as follows:


bookid and isbn are both specialized from <data> today, and bookmeta is
specialized from topicmeta. So, this generalizes back to:


If we add the isbn element to the topic prolog, I think we would do so as
topic/isbn rather than as "topic/data topic/isbn" - the core topic model
does not have any specialized elements, and I do not think that isbn would
be an exception.

If we then want to define </data>