[topicmapmail] subject proxies and subject maps

[Lars Heuer]

Hi Johannes,

> while thinking about how (and where) to implement a simple dereferencing
> mechanism for proxies (label -> proxy) I came across the question if 
> subject proxies can exist independently from any subject map (both 
> according to TMRM), e.g. in an application (context).

Well, a subject map is just a container for a finite set of proxies.
If you want, you can interpret a lonely proxy as a subject map with one
proxy. I think that's a valid interpretation. The 'bootstrapping'
ontology (isa, ako) is missing, though. And the legend is also
missing, if you don't provide a standard "noop" legend.

But you cannot "travel" from a proxy to the containing subject map.
Nobody forbids to implement such a feature, but the TMRM does not
provide such a feature.

If you remove a proxy from a subject map, you should take care about
the relationships to other proxies and you should take care about the
constraints which the legend mandates.

[...]
> However, what about the relationship between subject proxies and subject
> maps (TMRM)? I can not find the answer - an explicit statement - in TMRM

See above.

Best regards,
Lars
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