RE: [search-ws] faceted search

["LeVan,Ralph" <levan@oclc.org>]

We want the facets back with the search response.  We're content to let
the server pick the facets for us.

Not all indexes are supported as facets, so we'd have to enhance the
explain record to say which indexes could be scanned, but not scanned as
facets.

Ralph

> -----Original Message-----
> From: Ray Denenberg, Library of Congress [mailto:rden@loc.gov]
> Sent: Friday, September 19, 2008 4:31 PM
> To: search-ws@lists.oasis-open.org
> Subject: Re: [search-ws] faceted search
> 
> Ok.  Then I think we have two possible approaches:
> 
> 1. Via scan:
> We would want to consider eliminating the scan clause, add a query
> parameter
> (already mentioned), and enrich the scan response as Ralph suggests.
> 
> 2. Via searchRetrieve:
> First, would we want to get back regular result set records along with
> facet
> results, or just the facet results?
> If the latter, maybe we could just come up with a "facet" record
> schema. If
> we want both, and assuming we don't want this relegated to an
extension
> (in
> 2.0) then we need an additional parameter in the response, something
> like
> "facetResults" or something more general, "additionalSearchInfo".
> (That
> was a joke, of course. A Z39.50 relic.  But you get the point.)
> 
> --Ray
> 
> 
> 
> ----- Original Message -----
> From: "LeVan,Ralph" <levan@oclc.org>
> To: "Ray Denenberg, Library of Congress" <rden@loc.gov>;
> <search-ws@lists.oasis-open.org>
> Sent: Friday, September 19, 2008 4:02 PM
> Subject: RE: [search-ws] faceted search
> 
> 
> Scan doesn't work.  A scan response assumes that all the terms
returned
> are from the index in the request. So, there is no indication of the
> source index for the individual terms.  Facets can come from many
> indexes.  Languages are popular facets and they'd come from a language
> index.  Similarly for dates.
> 
> We need a response richer than scan.
> 
> In addition, the current proposal would require 2 interactions with
the
> server; once to do the search and once to get back the facets.  My
> proposal returns the facets with the search response.
> 
> My response goes into the extraResponseData and looks like this:
> <facetReport>
>   <facets index="indexName" count="numberOfFacets">
>     <facet count="numberOfMatchingDocuments">term</facet>
>     </facets>
>   </facetReport>
> 
> As you can see, I clump my facets by index.  If you prefer to have a
> flatter response and leave the clumping to the client, then the
> response
> could be:
> <facets count="numberOfFacets">
>   <facet index="indexName"
> count="numberOfMatchingDocuments>term</facet>
>   </facets>
> 
> The count on the facets element could be omitted.  Some applications
> prefer not to have to count the number of subelements.
> 
> Ralph
> 
> 
> 
> > -----Original Message-----
> > From: Ray Denenberg, Library of Congress [mailto:rden@loc.gov]
> > Sent: Friday, September 19, 2008 3:41 PM
> > To: search-ws@lists.oasis-open.org
> > Subject: Re: [search-ws] faceted search
> >
> > Ralph:
> >
> > "How about a flag on the request that says that you want facets
> > returned
> > in the search response?"
> >
> > But how would they be presented in a search response? I think the
> > reason for
> > suggesting scan is that the scan response is essentially how you
want
> > the
> > facets presented.
> >
> > --Ray
> >
> >
> >
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> 
> 
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