Hi Andy,

 

I am a SRU newbie myself, so I don't know how this could be achieved
using scan operations and could not find much info on SRU website
(http://www.loc.gov/standards/sru/).

As for the wildcards, according to this guide:
http://www.oclc.org/support/documentation/worldcat/searching/refcard/sea
rchworldcatquickreference.pdf the symbols should be preceded by at least
3 characters, and therefore clauses like: 

 

... AND srw.dd=*

... AND srw.dd=?.*

... AND srw/dd=###.*

... AND srw/dd=?3.*

 

 

do not work and result in the following error:

Diagnostics

Identifier:

info:srw/diagnostic/1/9

Meaning:

 

Details:

 

Message:

Not enough chars in truncated term:Truncated words too short(9)

 

 

Thanks,

Arash

 

________________________________

From: Houghton,Andrew [mailto:[log in to unmask]] 
Sent: 16 May 2012 11:58
To: Arash.Joorabchi
Subject: Re: [CODE4LIB] WorldCat SRU queries - elimination of records
without a DDC no from the result set

 

I'm not an SRU guru, but is it possible to do a scan and look for a
postings of zero?

 

Andy.

On May 16, 2012, at 6:39, "Arash.Joorabchi" <[log in to unmask]>
wrote:

	Hi mark,
	
	Srw.dd=* does not work either:
	
	Identifier:     info:srw/diagnostic/1/27
	Meaning:       
	Details:        srw.dd
	Message:        The index [srw.dd] did not include a searchable
value
	
	I suppose the only option left is to retrieve everything and
filter the results on the client side.
	
	Thanks for your quick reply.
	Arash
	
	
	-----Original Message-----
	From: Code for Libraries [mailto:[log in to unmask]] On
Behalf Of Mike Taylor
	Sent: 16 May 2012 10:43
	To: [log in to unmask]
	Subject: Re: [CODE4LIB] WorldCat SRU queries - elimination of
records without a DDC no from the result set
	
	There is no standard way in CQL to express "field X is not
empty".
	Depending on implementations, NOT srw.dd="" might work (but
evidently
	doesn't in this case).  Another possibility is srw.dd=*, but
again
	that may or may not work, and might be appallingly inefficient
if it
	does.  NOT srw.dd=null will definitely not work: "null" is not a
	special word in CQL.
	
	-- Mike.
	
	
	On 16 May 2012 10:32, Arash.Joorabchi <[log in to unmask]>
wrote:
	>  Hi all,
	>
	> I am sending SRU queries to the WorldCat in the following
form:
	>
	>
	>                String host =
	> "http://worldcat.org/webservices/catalog/search/";
	>            String query = "sru?query=srw.kw=\"" + keyword +
"\""
	>                                + " AND srw.ln exact \"eng\""
	>                                + " AND srw.mt all \"bks\""
	>                                + " AND srw.nt=\"" + keyword +
"\""
	>                                + "&servicelevel=full"
	>                                + "&maximumRecords=100"
	>                              + "&sortKeys=relevance,,0"
	>                                + "&wskey=[wskey]";
	>
	> And it is working fine, however I'd like to limit the results
to those
	> records that have a DDC number assigned to them, but I don't
know what's
	> the right way to specify this limit in the query.
	>
	>  NOT srw.dd=""
	>  NOT srw.dd=null
	>
	> Neither of above work
	>
	>
	> Thanks,
	> Arash
	>

________________________________

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.2176 / Virus Database: 2425/5001 - Release Date:
05/15/12