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On Wed, 2 Jul 1997, Diane Madrigal wrote: > > > On Wed, 2 Jul 1997, Paul Miller wrote: > > >We add the ADS are currently most interested in your first option, where > >all of the values are given in a single string. We would only split them > >if the values were drawn from more than one SCHEME or TYPE, as each use > >of > >an element is only allowed ONE SCHEME and/or TYPE. > > I wasn't following this thread too closely until I realized it affected > other elements besides "coverage." The "Hull, Yorkshire, England, etc." > example is somewhat comparable to a resource with multiple controlled- > vocabulary subject headings. > > Keywords are generally strung together in one meta tag, as Paul Miller > suggests doing with geographic values, but in the couple examples I've > seen using Library of Congress subject headings (LCSH) as the scheme, each > subject heading has had its own meta tag, e.g. > > <META NAME="DC.subject" SCHEME="LCSH" CONTENT="xxx"> > <META NAME="DC.subject" SCHEME="LCSH" CONTENT="yyy"> > <META NAME="DC.subject" SCHEME="LCSH" CONTENT="zzz"> > > I was about to implement something like the example above because that > seemed to be what was out there already. But if geographic values will be > strung together, as long as they're from the same scheme, then it seems > that all LCSH values should also be strung together (the approach I'd > prefer, actually). > > I haven't yet seen a conclusive answer in the discussion of the > "coverage" element -- is there anything in DC, as it currently stands, > that dictates that one format is "right," or at least that one is > preferred over the other? There's a difference between assigning multiple subject headings to a document via separate occurrences of a field and splitting out the component parts of a precoordinated heading into separate occurrences. The former is fine. The latter will result in a loss of content. In Paul's example Hull, Yorkshire, England, etc aren't separate values. They are really part of the same concept and belong to the same occurrence of the field - i.e., if this is the best way of building in authority control on the Web. --------------------------------------------------------------------------- Judith Pearce Acting Manager, ILMS National Library of Australia Email: [log in to unmask] Canberra ACT Phone: 61-6-2621652 2602 AUSTRALIA Fax: 61-6-2571703 ---------------------------------------------------------------------------