[OAI-implementers] Requesting a part of a record possible wit h OAI-OMH?

[Young,Jeff]

Achim,

I could probably add this feature to the ERRoL service for you without much
trouble (http://www.oclc.org/research/projects/oairesolver/). The URL you
could use would look something like this:

"http://errol.oclc.org/" + <oai-identifier> + "." + <metadataPrefix> +
"?xpath=" + <xpath expression>

If the repository doesn't use the oai-identifier scheme, the URL would look
like this:

"http://errol.oclc.org/" + <repository-identifier> + "/" + <identifier> +
"." + <metadataPrefix> + "?xpath=" + <xpath expression>

The response would be the corresponding XML fragment from the record.

Let me know if you're interested and I can add it to the list of ERRoL
features.

Jeff

>  -----Original Message-----
>  From: Joachim Wackerow [mailto:wackerow@zuma-mannheim.de]
>  Sent: Tuesday, January 20, 2004 7:58 AM
>  To: oai-implementers@oaisrv.nsdl.cornell.edu
>  Subject: [OAI-implementers] Requesting a part of a record 
>  possible with
>  OAI-OMH?
>  
>  
>  Is it possible to offer/request only a part of a record with OAI-PMH?
>  
>  For example: exists a way to request only the "dc:title" of 
>  an identifier?
>  
>  I browsed the open archives web site and found only the verb 
>  "GetRecord". In addition to offer or request a whole record, 
>  we would 
>  like to offer or request only one element of a XML document 
>  stored in a 
>  record.
>  
>  Background:
>  Requesting a whole record with DC information is no problem. 
>  But we are 
>  thinking about using OAI-PMH to offer DDI-structured information on 
>  social science surveys. DDI is an extensive description 
>  format (in XML) 
>  with ca. 300 elements on surveys 
>  (http://www.icpsr.umich.edu/DDI/). For 
>  some scenarios it would be more effective to offer/request only one 
>  element or one element group of the xml document.
>  
>  Regards, Achim
>  --
>  ZUMA - Centre for Survey Research and Methodology
>  
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