[OAI-general] Search Protocol for searching based on DC elements

Hussein Suleman hussein@vt.edu
Thu, 31 Jan 2002 09:27:15 -0500


a few more comments about the searching-over-OAI issue ...

- i think OAI-PMH should always be directed towards harvesting - 
extensions are great, but there must be clean separation. the approach 
we advocate is to separate the archive and extension into distinct 
components. the archive then becomes the data provider, and the 
component an OAI service provider (and a data provider in the context of 
a different protocol  - this different protocol is what we're interested in)

- our solution is meant to be general and extensible (we don't want to 
invent query languages - we want to look into using familiar wrappers) 
the extensibility mechanism also must cover different searching 
strategies and, more generally, other DL requirements beyond searching...

- for a peek at the testbed we have been running for the last 8 months 
now, try http://purl.org/net/etdunion

- you can download and install a reference implementation of the search 
component from http://oai.dlib.vt.edu/odl

- more components are in the works :)


Martin Vesely wrote:

> Hello,
> I am happy that some efforts exist in this direction. Some effort has been
> here for some time already (see [1]). I understand the intention to keep
> the two modes (searching/harvesting) distinct. But in fact, the way how
> the OAI sets are eventually implemented is similar (can be even equal as
> it is the case in our repository) to how the set-encapsulated-queries
> would be implemented (suggested in referenced paper [2]). When we then
> implement OAI-sets and queries inside of them, we are implementing twice
> the same thing, using two protocols though.
> Regards,
> Martin
> [1] http://documents.cern.ch/ettdh/doc/public/OAIRSF.html
> [2] http://www.dlib.org/dlib/december01/suleman/12suleman.html
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> On Wed, 30 Jan 2002, Xiaoming Liu wrote:
>>There are some efforts of encoding queries in sets parameter, you may
>>take a look at
>>On Wed, 30 Jan 2002, Paresh Joshi wrote:
>>>I am interested in knowing how can we search using OAI protocal on multiple
>>>parameters like dc.title, dc.creator, dc.language etc. 
>>>Any advice is greatly appreciated. 
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hussein suleman - hussein@vt.edu - vtcs - http://www.husseinsspace.com