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Worldcat Link Manager will use the last valid (including check digit) ISBN in the OpenURL, whether in an rft_id or in an rft.isbn. Currently xISBN is used in the response if it is turned on. Multiple rft_id is valid according to spec. On Feb 19, 2008, at 9:26 AM, Ross Singer wrote: > Actually, this: > http://alcme.oclc.org/openurl/servlet/OAIHandler/extension?verb=GetMetadata&metadataPrefix=mtx&identifier=info:ofi/fmt:kev:mtx:ctx > > indicates that multiple rft_ids *are* valid, and, in fact, would have > to be, since you could very easily have a DOI and a PMID and, say, a > SICI. > > I have no idea what any resolver would do with this bundle of ISBNs, > of course. It also seems somewhat contrary to the intention of the > Book metadata format, since I think it's (in my murky view of FRBR-y > terms) trying to define a manifestation rather than the expression > level that Bill is trying to use it for. I could be weaving in my own > interpretations and biases there. > > An alternative would be use by-reference context objects and then make > the context objects available as XML. You could have multiple context > object available in one XML document this way. A combination of > COinS/unAPI could make something like this possible. > > -Ross. > > On Feb 18, 2008 6:53 PM, Karen Coyle <[log in to unmask]> wrote: >> Actually, the max occurrence of ALL of the KEV keys is 1 except for >> "au" >> (which is unlimited). I remember discussions in which we acknowledged >> that one key NE one value, eg you could input multiple values if your >> recipients were in agreements (a poor excuse, I know). Thus: >> "isbn:3333;isbn:8888". My only memory for why max=1 for all of >> these is >> that it has to do with the fact that there is no structure or >> dependency >> in KEV, so an OpenURL with keys >> &rft.au=nnn&rft.title=ttt&rft.au=pppp&rft.title=rrrr >> isn't interpretable in terms of what authors go with what titles. Why >> the exception for au but for no other fields? My memory fails me >> here. >> Undoubtedly it made sense at the time. >> >> kc >> >> >> Jay Luker wrote: >>> Hi William, >>> >>> According to the book KEV format (defined here: >>> ttp://tinyurl.com/2psmkq) the max occurrence of the isbn key is 1. >>> I'm >>> assuming that by extension that means that the rft.<m-key> (i.e., >>> rft.isbn) form is also limited to one occurrence. So specifying >>> multiple ISBNs that way is a no go. >>> >>> You can however specify multiple referent identifiers. From the KEV >>> Context Object format matrix (http://tinyurl.com/2r5hsc): "Multiple >>> instances of rft_id do not indicate multiple Referents, but rather >>> multiple ways to identify a single Referent" >>> >>> So I *think* what you could do is this: >>> >>> "rft_id=urn:isbn:<isbn1>&rft_id=urn:isbn:<isbn2>&..." >>> >>> Also, I'd be remiss not to point you to a more authoritative list >>> for >>> OpenURL questions: http://listserv.oclc.org/scripts/wa.exe?A0=OPENURL >>> . >>> Although I'm sure there's plenty of overlap in interest/knowledge in >>> the subject between the lists. >>> >>> -- >>> Jay Luker [log in to unmask] >>> Software Engineer, Ex Libris Inc. >>> (617) 332-8800, x604 http://www.exlibrisgroup.com >>> >>> On Feb 17, 2008 3:14 AM, William Denton <[log in to unmask]> wrote: >>>> I'm hep to the COInS scene now and am using it in some lists of >>>> books I'm >>>> generating. For some of the books I know multiple ISBNs. Can I >>>> include >>>> them all in one COInS span somehow? Doing one individually makes >>>> my >>>> OpenURL Referrer extension clutter up the page with a lot of links. >>>> >>>> I looked at the specification but it didn't seem to cover this. >>>> generator.ocoins.info only seems to want one one ISBN. Putting >>>> multiple >>>> rft.isbn variables just makes the last one overpower the earlier >>>> ones. >>>> >>>> Any tips appreciated! >>>> >>>> Bill >>>> -- >>>> William Denton, Toronto : www.miskatonic.org www.frbr.org www.openfrbr.org >>>> >>> >>> >> >> -- >> ----------------------------------- >> Karen Coyle / Digital Library Consultant >> [log in to unmask] http://www.kcoyle.net >> ph.: 510-540-7596 skype: kcoylenet >> fx.: 510-848-3913 >> mo.: 510-435-8234 >> ------------------------------------ >>