Just noticed that at least in my copy of the 1.2 DTDs, topichead does not
allow the @keys attribute.
I think this must be a bug as we have established through separate
discussion and decisions that, using chunk, it can be meaningful to address
a topichead in order to either address it as a unit of navigation or as a
reference to a topic (whose existence is implied by a @chunk value).
Cheers,
E.
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Eliot Kimber | Senior Solutions Architect | Really Strategies, Inc.
email: ekimber@reallysi.com