Impact assessment for <foreign> and <unknown> elements

<foreign> and <unknown> elements

Background:
http://lists.oasis-open.org/archives/dita/200504/msg00033.html

Description:
http://www.oasis-open.org/apps/org/workgroup/dita/download.php/17435/IssueNumber35.html

Note: The above mentioned document in "Description" needs to be updated to
reflect the
TC decision mentioned in the following TC minutes from 060411.
http://www.oasis-open.org/apps/org/workgroup/dita/download.php/17663/DitaTCMeeting060411.txt

Architectural specification

- Add a topic explaining that the <foreign> and <unknown> element provides
an open extension for
existing standard vocabularies for non-textual content and an extension for
uses cases that have
yet to be identifies, respectively. The topic will also define the expected
processing
and fall-through behavior for each element.

http://docs.oasis-open.org/dita/v1.0/archspec/speclimits.html
- Add a caution against using the <foreign> and <unknown> elements for
textual content.
The <data> elements should be used for incorporating textual content from
existing vocabularies
via specialization.

Language reference

Add reference topics describing the <unknown> and <foreign> elements

http://docs.oasis-open.org/dita/v1.0/langspec/ditaref-type.toc.html
- Add links to the reference topics for the <unknown> and <foreign>
elements under "specialization elements" heading

http://docs.oasis-open.org/dita/v1.0/langspec/ditaref-alpha.toc.html
- Add links to the reference topics for the <unknown> and <foreign>
elements in the alphabetical listing

Eric A. Sirois
Staff Software Developer
DB2 Universal Database - Information Development
DITA Migration and Tools Development
IBM Canada Ltd. - Toronto Software Lab
Email: 
Phone:(905) 413-2841
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