[open-bibliography] New BNB sample data available

[Simon Spero]

On Mon, Feb 7, 2011 at 1:49 PM, Karen Coyle <kcoyle at kcoyle.net> wrote:

> Quoting "Young,Jeff (OR)" <jyoung at oclc.org>:

I agree that you have stated these as equivalents, but do you agree that
> these two concepts use different identifiers?
>
>
> kc
>

The constraint is stronger than that; If two Things have different preferred
labels  in a given language in the same conceptScheme, then it is
necessarily true that they have different identifiers, *and* that the
identifiers are owl:differentFrom.

 Notice that LCSH has different schemes for juvenile and non-juvenile
headings (some of which have the same preferred label/Descriptor).   Terms
can be in different
registers<http://www.ttt.org/clsframe/datcats02.html#register>without
being in different languages.  There's even an ISO registry of
register - http://www.isocat.org/rest/dc/1988 .

Also, if distinct uris which refer to Concepts which exactMatch, the
Concepts have the same extension, but the uris need not refer to the same
Concept object (in fact, in the case discussed above, the URIs cannot be
referring to the same object).

BTW, SKOS explicitly declines to make exactMatch reflexive,  though it does
make it Symmetric and Transitive, which means that if A exactly matches
anything, it exactly matches itself.

Simon
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