> But I notice that the recent DCMI schemas say things like
>
> dcterms:LCSH dcterms:issued "2000-07-11" .
>
> These statements don't seem to fit with the view above, because LCSH was
> around before 2000. So I'm a bit unsure now what
> http://purl.org/dc/terms/LCSH really does identify!
According to the Namespace Policy [1]:
A DCMI Term is a DCMI element, a DCMI qualifier or term
from a DCMI-maintained controlled vocabulary. Each DCMI
term ... is identified by a Uniform Resource Identifier
(URI)...
Simplifying and transforming...:
The URI identifies a [metadata] term.
The statement 'dcterms:LCSH dcterms:issued "2000-07-11" .' is
true because this DCMI Term -- in this case, an Encoding
Scheme -- was issued in 2000.
According to the DCMI Grammatical Principles [2], Section 2.2.2:
An Encoding Scheme provides contextual information ...
that aid[s] in the interpretation of a term value.
In other words, "dcterms:LCSH" is a DCMI-maintained "adjective"
for giving context to a value (e.g., a Library of Congress
Subject Heading), and that DCMI-maintained adjective is
identified by a DCMI-maintained URI.
Maybe this is another example of the ambiguity inherent in:
http://ibm.com dcterms:created "1911" . - the company
as opposed to
http://ibm.com dcterms:created "1993-03-25" . - the Web page
If you say "Let's talk about politics" and I'm a dictionary
editor, I might answer: "It is a noun, it derives from the
Greek 'polis', and it entered the English language in...".
Tom
[1] http://dublincore.org/documents/dcmi-namespace/
[2] http://dublincore.org/usage/documents/principles/
--
Dr. Thomas Baker [log in to unmask]
Institutszentrum Schloss Birlinghoven mobile +49-160-9664-2129
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