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There isn't - it's an ISBN-A, an actionable DOI.

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On Aug 2, 2013, at 4:42 PM, Karen Coyle <[log in to unmask]> wrote:

> Richard, did you see my note about DOI and the ISBN? They claim to be the official ISBN as URI:
> 
> http://www.doi.org/factsheets/ISBN-A.html
> 
> I believe that there is no problem translating an ISBN string into the DOI URI.
> 
> kc
> 
> On 8/2/13 1:23 PM, Wallis,Richard wrote:
>> 
>> On 2 Aug 2013, at 20:18, J. McRee Elrod <[log in to unmask]> wrote:
>> 
>>> Richard Wallis posted:
>>> 
>>>> [In the linked data world] there is a             significant difference between
>>>> the >numbers (OCLC number, LCCN, ISBN, etc.) associated with a
>>>> resource and the >URI that identifies it.
>>> 
>>> Of these numbers, only ISBN is associated with the resource.  The OCN,
>>> LCCN, and other national bibliographic agency nubers, are associated
>>> with the description.
>> 
>> That is true, the numbers have been associated with the records (descriptions). However the URI is a [linked data] identifier for the resource. 
>> 
>> Note the '[In the linked data world]' in the text above you referenced.  Linked data uses http URIs as identifiers for resources, so that they can be linked and those links followed.  Obviously there is need to record numbers and other identifying         strings (which are not http URIs) that have been used to identify the resource in other domains, as properties in the RDF description.
>> 
>> ISBN is a bit of a special case, it is an identifier for the resource, it is a string, it is not a http URI that can be used as a linked data identifier.  So in RDF it is captured as a string property. 
>> 
>> ~Richard.
> 
> -- 
> Karen Coyle
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