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:hough...@oclc.org] 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" <arash.joorab...@ul.ie> 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:CODE4LIB@LISTSERV.ND.EDU] On Behalf Of Mike Taylor Sent: 16 May 2012 10:43 To: CODE4LIB@LISTSERV.ND.EDU 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 <arash.joorab...@ul.ie> 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
