[sc34wg3] TM Data Model issue: assoc-role-player-type

[Steve Pepper]

* Geir Ove Grønmo
| * Kal Ahmed
| | I think it makes more sense to require the [role playing topic] property
| | to be non-null.
| |
| | If you want to say that  the player is unknown, then you should be
| | required to create a topic to represent the "unknown" entity...
|
| I like this solution: mandatory role types and "blank" topics for
| "missing" role player references.

This does have a downside, though: You would have to create a topic
for *every* '"unknown" entity' in the topic map -- you couldn't use
the same topic for each one, otherwise you would get undesired
merging.

Steve

--
Steve Pepper <pepper@ontopia.net>
Chief Executive Officer, Ontopia
Convenor, ISO/IEC JTC 1/SC 34/WG 3
Editor, XTM (XML Topic Maps 1.0)