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questions about notations / sizes / coordination

From: Jakob Voss <jakob.voss@gbv.de>
Date: Wed, 12 Jul 2006 11:45:37 +0200
Message-ID: <44B4C4C1.6030302@gbv.de>
To: public-esw-thes@w3.org


SKOS seems very useful but after reading the documentation I have three
questions about essential properties of a langauge to describe KOS like
promised in the abstract of SKOS Core:

1. How to encode Notations

This question has been raised in February but a clear answer is missing.
 Here is yet another possible solution: A notation is a prefered label
of an artificial language so just use:

<skos:prefLabel xml:lang="art">...</skos:prefLabel>

"art" is included in ISO 639-2.

Advantage: No change needed
Disadvantage: every KOS can only have one notation system

2. How to get the size of a collection

When browsing through a KOS you'd like to get the number of items that
are indexed with a concept (or with a concept and its subconcepts!). For
example see


In this case the number of items in class Arts:Costumes (33) is shown,
but there are only 5 items that are directly indexed with Arts:Costumes
so you need a way to encode two numbers with a concept - any suggestions
who to do it in a consistent way

3. How to encode concept combinations

This is slightly complex but important. Maybe it can easily can be
solved with SKOS Mapping which I have not looked at enough. In some
thesauri you have non-prefered-terms and relations that point you to use
a concept in combination with another concept or vice versa to indicate
postcoordination or precoordination in indexing.

For instance the concept "Spanish town" could be defined as non-prefered
and point you to use the two concepts "Spain" and "town"
(post-coordination) or if you want to have "Spanish town" as a concept
for indexing (pre-coordination) then "Spain" and "town" both have a
special kind of associative relationship to "Spanish town".

How should I encode this in SKOS?

Thanks and greetings,
Received on Wednesday, 12 July 2006 09:45:10 UTC

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