proposed changes to map.mod to support key definitions

[Alan Houser <arh@groupwellesley.com>]

Colleagues,

I wanted to attempt to summarize my implementation of changes to map.mod 
to support key definitions in XDITA. The LwDITA SC discussed these 
modifications during Monday's meeting. The changes (particularly the 
addition of <linktext>) were informed by the DITA 1.3 spec topic on 
processing key references to generate text --

http://docs.oasis-open.org/dita/dita/v1.3/errata01/os/complete/part1-base/archSpec/base/processing-keyref-for-text.html#processing_key_references

I need to test these changes before I submit a pull request, but wanted 
to run them by the SC for your review.

-Alan

----

*** map ***
Original: <!ELEMENT map        (topicmeta?, topicref*)  >
New: <!ELEMENT map        (topicmeta?, (topicref | keydef)*) >

*** topicmeta ***
Original: <!ELEMENT topicmeta     (navtitle?, data*) >
New: <!ELEMENT topicmeta     (navtitle?, linktext?, data*) >

*** linktext (previously undefined in LwDITA) ***
<!ELEMENT linktext     (%ph;) >  <!-- Note: In map.mod, <ph> does not 
include typography domain. -->
<!ATTLIST linktext
             class CDATA "- map/linktext ">

*** keydef (previously undefined in LwDITA) ***
<!ELEMENT keydef    (topicmeta?, data*)        >
<!ATTLIST keydef
               href

                         CDATA
                                   #IMPLIED
              keys
                         CDATA
                                   #REQUIRED
               processing-role
                         CDATA       #FIXED      'resource-only'
               class CDATA "+ map/topicref mapgroup-d/keydef"
>


--
Alan Houser
Group Wellesley, Inc.
Consultant and Trainer, Technical Publishing
arh on Twitter
412-450-0532