Wikipedia uses the DC metadata format for non-book objects,  
rft.identifier is part of the DC metadata format; if you are  
describing a book, you want to use the book metadata format.

Jonathan is correct, rft_id is a possible place to put an accession  
number for a book, but only if you can make a URI out of it. You might  
also consider rft_dat as long as you include rfr_id.

Great to hear LibraryThing is looking at COinS!

Eric


On Apr 29, 2009, at 4:01 PM, Chris Catalfo wrote:

> Hi all,
>
> I am trying to find the best way to include an item's accession  
> number (i.e.
> ILS system id) in a COiNS span.  This is in the context of library  
> catalog
> pages where I'd like to be able to retrieve the ILS accession number  
> to
> return to LibraryThing for Libraries.
>
> I see no mention of an rft.identifier key/value pair on the COiNS  
> site's
> brief guide to books [1].  It does, however, appear as an element in  
> the
> COiNS online generator for generic items [2].
>
> Googling returned a couple of results using rft.identifier to hold  
> urls.
>
> Can anyone enlighten me as to whether using rft.identifier to hold  
> the ILS
> accession number is valid?  Or suggest a more suitable key/value pair?
>
> Thanks for any help you can provide.
>
> Chris Catalfo
> Programmer, LibraryThing
>
> [1] http://ocoins.info/cobgbook.html
> [2] http://generator.ocoins.info/?sitePage=info/dc.html&

Eric Hellman
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