[topicmapmail] SAM question

[jalgermissen@topicmapping.com]

"HERBUEL Alain (DSIT-EX)" <alain.herbuel@sncf.fr> schrieb am 01.10.2003,
20:15:16:

> Question : type of something in SAM
> * Topic may have a type
> * Occurrence may have a type
> * Association may have a type
> * TopicName may have a type (new with SAM)
> * AssociationRole may have a type (new with SAM)
> 
> In 5.1 Type-instance relation, you describe a PSI
> (http://psi.topicmaps.org/sam/1.0/#type-instance
>  ) for special association
> "Type-instance".
> Is the [type] relation in SAM model a sort of syntactic shortcut to express
> the same thing (like InstanceOf in XTM)?

What I understood from N0396 is that it is a property of the information
item
and thus it is explcitly NOT a relationship. To me, this design decision
reflects
the idea that the relationship between an item (e.g. baseName item) and
the
topic that represents the type is not recognized as a subject. Simply
said:
The authors of N0396 decided that no statements may be made about these
relationship.

Lars, does that make sense?

Jan
> 
> ======================================
> Alain Herbuel
> SNCF (French national Railway company)
> E-Mail : alain.herbuel@sncf.fr
> ======================================
-- 
Jan Algermissen                <algermissen@acm.org>
Consultant & Programmer

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