[topicmapmail] Using sort and display PSIs in naming

[Kal Ahmed]

On Sat, 2003-03-29 at 16:51, Lars Marius Garshol wrote:
> 
> * G. Ken Holman
> | 
> | Sorry I worded my statement poorly, I was talking about the
> | specifications and the fact the PSI's had changed between XTM 1.0
> | and SAM-20030309.
> 
> Ah, I see. To answer your original question I don't believe any
> software providers have started supporting the new PSIs yet, so I
> would continue to use the old. I wouldn't expect support for the new
> ones to start appearing before the SAM document enters the official
> ISO paper mill.
> 

Once you do have software supporting the new PSIs, migrating your topic
map should be as simple as declaring subject equivalence between the old
and the new PSIs:

<topicMap>
  <topic id="sort">
    <subjectIdentity>
      <subjectIndicatorRef xlink:href="...XTM PSI ..."/>
      <subjectIndicatorRef xlink:href="...SAM PSI ..."/>
    </subjectIdentity>
  </topic>
  <!-- etc. -->
</topicMap>

which you can then merge with your existing topic map:

<topicMap>
  <!-- Call in my existing topic map -->
  <mergeMap xlink:href="mytopicmap.xtm"/>
  <!-- Call in the topic map that declares the XTM/SAM mapping -->
  <mergeMap xlink:href="map-psis.xtm"/>
</topicMap>

So you can actually migrate the topic map without having to edit it at
all.

Cheers,

Kal