Ah, you're referring to rft_id, and I was looking at the ISBN element in
the KEV Book format. So using rft_id would work.
The reason for multiple ISBNs is that many MARC records have ISBNs for
the hard copy and the paperback. Without going through some gyrations
you don't know which is which, although for purposes like ILL either is
valid. There are also multi-volume works that each get an ISBN.
Like other FRBR "levels" manifestation has a fairly wide range of
ambiguity. A book simultaneously published in two countries... is that
one manifestation or two? What if they each get a separate ISBN? A
hardback and trade paperback that come out at the same time, where the
only difference is the cover... and the ISBN?
Although I often use the shortcut of "ISBN = manifestation" the fact of
it is that ISBNs are publisher inventory and sales numbers and are used
in ways that are convenient for publishers. They also get mis-assigned
frequently, as some tests being run on bib data at the Open Library are
showing.
kc
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 <[EMAIL PROTECTED]> 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 [EMAIL PROTECTED]
Software Engineer, Ex Libris Inc.
(617) 332-8800, x604 http://www.exlibrisgroup.com
On Feb 17, 2008 3:14 AM, William Denton <[EMAIL PROTECTED]> 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
--
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Karen Coyle / Digital Library Consultant
[EMAIL PROTECTED] http://www.kcoyle.net
ph.: 510-540-7596 skype: kcoylenet
fx.: 510-848-3913
mo.: 510-435-8234
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--
-----------------------------------
Karen Coyle / Digital Library Consultant
[EMAIL PROTECTED] http://www.kcoyle.net
ph.: 510-540-7596 skype: kcoylenet
fx.: 510-848-3913
mo.: 510-435-8234
------------------------------------
