Arash,
Yes, we have made WorldCat available to researchers under a special
license agreement. I suggest contacting Thom Hickeyhic...@oclc.org
about such an arrangement. Thanks,
Roy
On Fri, May 18, 2012 at 3:46 AM, Arash.Joorabchi arash.joorab...@ul.ie wrote:
Dear Karen,
I am conducting a research experiment on automatic text classification and I
am trying to retrieve top matching bib records (which include DDC fields) for
a set of keyphrases extracted from a given document. So, I suppose this is a
rather exceptional use case. In fact, the right approach for this experiment
is to process the full dump of WorldCat database directly rather than sending
a limited number of queries via the API.
I read here:
http://dltj.org/article/worldcat-lld-may-become-available under-odc-by/
that WorldCat might become available as open linked data in future, which
would solve my problem and help similar text mining projects. However, I
wonder if it is currently available to researchers under a
research/non-commercial use license agreement.
Regards,
Arash
-Original Message-
From: Code for Libraries [mailto:CODE4LIB@LISTSERV.ND.EDU] On Behalf Of Karen
Coombs
Sent: 17 May 2012 08:37
To: CODE4LIB@LISTSERV.ND.EDU
Subject: Re: [CODE4LIB] WorldCat SRU queries - elimination of records without
a DDC no from the result set
I forwarded this thread to the Product Manager for the WorldCat Search
API. She responded back that unfortunately this query is not possible
using the API at this time.
FYI, the SRU interface to WorldCat Search API doesn't currently
support any scan type searches either.
Is there a particular use case you're trying to support? Know that
would help us document this as a possible enhancement.
Karen
Karen Coombs
Senior Product Analyst
Web Services
OCLC
coom...@oclc.org
On Wed, May 16, 2012 at 9:49 PM, Arash.Joorabchi arash.joorab...@ul.ie
wrote:
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
