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Subject: unknown and foreign elements




From: Michael Priestley <mpriestl@ca.ibm.com>
To: dita@lists.oasis-open.org
Date: Mon, 10 Apr 2006 21:59:32 -0400




Belatedly providing my reasoning for
making the foreign element a specialization of a more general unknown element:

- "unknown" for me expresses
that the purpose of the content is unknown; and so default behavior will
be to ignore the content when outputting the topic. Some examples of elements
that could be specialized from unknown could include required-cleanup and
reusable-elements.
- "foreign" is a particular
kind of content with an unknown purpose, in which we at least know why
it's unknown (it's a non-DITA vocabulary). Some examples could be mathml,
SVG...

I hope this clarifies,

Michael Priestley

IBM DITA Architect and Classification Schema PDT Lead

mpriestl@ca.ibm.com

http://dita.xml.org/blog/25











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