[topicmapmail] Questions About XTM Occurrence Semantics

[Peter P. Jones]

Hi All,

I have some questions that relate to XTM capabilities (perhaps XTM 2
capabilities).

Imagine I have a topic for some subject and in some scope, say {a,b,c},
that topic has an occurrence with a particular locator.

If I reify that occurrence, what is the precise meaning of the reifying
topic construct?

Is it:
a) A reification of the particular information item that is that
occurrence? So I can talk about the information item.
b) A reification of the particular occurrence of the subject somewhere
(outside TM-land)?
c) Something else I haven't thought of.

What I would like is to reify a particular occurrence, but I would also
like the intent of the reification to be that I am reifying the
occurrence of the subject and not the technical construct of the TM
information item, if that is possible.

In the reifying topic construct, does it make a difference w.r.t. the
above whether I use a subject locator or subject identifier.
I.e. does subject locator provide for (b) while subject identifier
provides for (a)?
Or are matters more like (c)?

Thanks in advance,
Peter