On 7/18/14, 3:34 PM, Robert Sanderson wrote:
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Or an HTTP space such as Jeff's suggested purl.org
This may be a question for Jeff ... must PURLs re-direct to a non-PURL URL? - If so, then in any case one will need a conformant non-PURL URL for the identifiers.

Taking Ray's example “info:bibframe\publisherNumber\ 256A090” - that could be expressed as "http://bibframe.org/publisherNumber/256A090". I rather doubt that it makes sense to create a PURL for every identifier value, although I like the idea that one could re-direct to a more authoritative URL when the relevant agency actually instantiates a URL form of the identifier scheme.

There's another issue, which is that the "identifiers" in the records today aren't normalized. As Thomas Berger points out, already the LCNA identifier has a different form when encoded in a URL:

MARC: $a n 96055058
URL: http://id.loc.gov/authorities/names/n96055058

I suspect that Ray's publisher number example has been normalized. Some of the schemes are quite awkward in form, using varying punctuation:

074 ##$a277-A-2 (MF)

 and sometimes being multi-part, such as:

017 ##$aEU781596$bU.S. Copyright Office
017 ##$aDL 80-0-1524$bBibliothèque nationale du Québec
017 ##$aPA1116341$bU.S. Copyright Office$d20020703

Some of us have the experience of developing search algorithms for these identifiers, but search is considerably different from minting a URI - to begin with, the usage of these in library systems does not require them to be unique; occasionally two normalize to the same string.

What I think we are forgetting here is how we use these various codes and numbers. Essentially they are searched and displayed. In the future we may be using them for linking. This means that if they are "converted" to URLs, they will still need human-readable labels, and some thought must be given to how (if?) they can be made searchable.


Karen Coyle
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