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On 25 Jan 2013, at 16:07, Syd Bauman <[log in to unmask]>
 wrote:

>> What's the best way for a document to announce to its consumers
>> what the @type attribute in <idno> means? 
> 
> My instinct is that, like any other controlled vocabulary on the
> @type of any other element, the way to define what it means is in the
> ODD. Something like:
> 
>      <valList type="closed">
>        <valItem ident="ASIN">
>          <gloss>Amazon standard identification number</gloss>
>          <desc>Sometimes called the Amazon standard item number,
>          provides a unique propriety identifcation of an
>          edition-level entity within Amazon.com. It is often the
>          same as the ISBN. See <ptr
>          target=
>          "https://www.amazon.co.uk/gp/help/customer/display.html?nodeId=898182"/>.
>          </desc>
>        </valItem>
>      </valList>
>    </attDef>


yes, but this is problematic for two reasons. a) there is (almost always) no link from the
document instance to the ODD (usually), and b) its not machine readable
(in the sense of being able to transform the number into a URL)

--
Sebastian Rahtz      
Director (Research Support) of Academic IT Services 
University of Oxford IT Services
13 Banbury Road, Oxford OX2 6NN. Phone +44 1865 283431