[ZOOM] PyZ3950 & OCLC Worldcat; YAZ & SWIG

Adam Dickmeiss adam at indexdata.dk
Sun May 30 08:19:19 CEST 2004


Robert Sanderson wrote:

>On Wed, 26 May 2004, Aaron Lav wrote:
>  
>
>>On Wed, May 26, 2004 at 04:47:11PM -0500, Charles Bearden wrote:
>>    
>>
>
>  
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>>>From the source code it appears that PyZ3950.zoom.Query
>>>accepts only CCL queries but then builds a (ASN.1 encoded?) RPN query
>>>      
>>>
>>but for the record, PyZ3950 does support PQF, and, if you feel like
>>generating the RPN structures yourself, you can do that (although
>>    
>>
>
>Our CVS version (which we should really release properly if Aaron hasn't
>already!) also supports Cheshire's query language, CQL, server side CQL
>and the Z-SQL spec.
>
>One note about the PQF support though:  the syntax used must mirror the 
>RPN -- you can't do things like:
>
>@attr 3=3 @and @attrset bib1 @attr 1=4 fish @attr 2=9 baz
>  
>
This query is invalid PQF. @attrset can only be specified once and in 
the beginning of the query.

>You have to just repeat the @attrs for each clause.
>  
>
And you call it PQF :)

-- Adam

>Rob
>
>  
>






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