I wonder how xID handles superceded OCLCnums, if it'll still succesfully 
find the right matches for you?

Ray Denenberg, Library of Congress wrote:
> From: "Eric Lease Morgan" <[log in to unmask]>
>   
>>   1. What MARC field/subfield might I put this string?
>>   2. How would I go about getting the string indexed?
>>   3. How might I go about querying the server for records with this 
>> string?
>>     
>
> I can at least talk about the third question.  There was work on a marc 
> attribute set, though not completed.  If you look at the oid register at 
> http://www.loc.gov/z3950/agency/defns/oids.html you'll see that the latest 
> work on it (second draft) was in 2000, 
> http://www.nlc-bnc.ca/iso/z3950/MARC_attribute_set_2.doc. So if someone 
> actually wanted to put it to use it would have to be completed.
>
> For SRU there is a complete marc context set, 
> http://www.loc.gov/standards/sru/resources/marc-context-set.html.
>
> --Ray
>
>