[topicmapmail] Are Facets Really Simple After All?

[Kal Ahmed]

On Sun, 2003-11-30 at 18:32, Murray Altheim wrote:
<snip>
>    2. Using a Topic occurrence. I'm leaning towards advocating that
>       RDF-style property assignment be handled via Topic occurrences,
>       whenever the application doesn't demand or suggest they be
>       fully reified as Topics. There's some screwy semantics to doing
>       this that I'm not entirely comfortable with, as Topic occurrences
>       are occurrences of their Topics, not properties of their Topics.

Occurrences are "information that is specified as being relevant to a
given subject" (ISO 13250:2002, 3.28 - the same phrase is repeated in
XTM 1.0, section 2.2.3). I think it is a mistake to read too much into
the name "occurrences". I have always considered it perfectly valid
(indeed the only way) to encode properties of topics where the property
value is not something that you want to talk about any further within
the topic map.

Cheers,

Kal
-- 
Kal Ahmed, Techquila
Standards-based Information Management
e: kal@techquila.com
w: www.techquila.com
p: +44 7968 529531