Re: New BNB sample data available

We are using extension in the same sense here; the set of things denoted by
a term.

For background, see e.g.  the following references:

Chan et. al (1985)  is  a collection of source materials from Cutter
onwards.

Subject indexing refers to the application of a vocabulary, which may be
more or less well structured, to indicate the content or aboutness of
documents  (Chan et. al 1985, p. xiii).

Svenonius (2000) is a very readable text on the theoretical issues in
information organization.


Subject language terms differ referentially from words used in ordinary
language. The former do not refer to objects in the real world or concepts
in a mentalistic world but to subjects. As a name of a subject, the term
Butterflies refers not to actual butterflies but rather to the set of all
indexed documents about butterflies (Svenonius 2000, p. 130).


References:

Chan, Lois Mai, Phyllis A. Richmond, and Elaine Svenonius (1985). “Preface”.
In: Theory of subject analysis:

a sourcebook. Ed. by Lois Mai Chan, Phyllis A. Richmond, and Elaine
Svenonius. Libraries Unlimited.

ISBN: 0872874893.

Svenonius, Elaine (2000). The Intellectual Foundation of Information
Organization. Cambridge, Mass.: MIT

Press. ISBN: 0262194333. URL:
http://www.netlibrary.com/AccessProduct.aspx?ProductId=39954 .


Simon


On Tue, Feb 8, 2011 at 12:47 PM, Young,Jeff (OR) <jyoung@oclc.org> wrote:

> Simon,
>
>
>
> We appear to be using the term “extension” in different ways. I assumed you
> meant it in the OWL sense:
>
>
>
> “Classes provide an abstraction mechanism for grouping resources with
> similar characteristics. Like RDF classes, every OWL class is associated
> with a set of individuals, called the *class extension*.”
>
> http://www.w3.org/TR/owl-ref/#Class
>
>
>
> Do you have a reference I could check out for how the term is used
> differently in KOS systems to indicate a set of documents instead?
>
>
>
> Jeff
>
>
>
> *From:* sesuncedu@gmail.com [mailto:sesuncedu@gmail.com] *On Behalf Of *Simon
> Spero
> *Sent:* Tuesday, February 08, 2011 12:30 PM
> *To:* Young,Jeff (OR)
> *Cc:* Karen Coyle; open-bibliography@lists.okfn.org; public-lld
>
> *Subject:* Re: New BNB sample data available
>
>
>
> On Tue, Feb 8, 2011 at 11:39 AM, Young,Jeff (OR) <jyoung@oclc.org> wrote:
>
> Simon,
>
>
>
> I’m confused by your statement “the Concepts have the same extension”.
>
>
>
> The extension of a KOS Concept is the set of all documents that the Concept
> is about.
>
>
>
> Simon
>