Re: [Dspace-tech] Apostrophes in searches
Just replying to my own email to record the answer.
DSpace 1.8 included an upgrade to Lucene 3.3.0. With 3.3 Lucene seems to
have changed the default Analyzer to no longer be an english language
analyser. From the javadocs...
* ClassicAnalyzer was named StandardAnalyzer in Lucene versions prior
to 3.1.
* As of 3.1, {@link StandardAnalyzer} implements Unicode text
segmentation,
* as specified by UAX#29.
I think the old behaviour can be reinstated by changing dspace.cfg to
have...
search.analyzer = org.apache.lucene.analysis.standard.ClassicAnalyzer
Cheers.
On 01/11/12 16:11, TAYLOR Robin wrote:
Hi all,
I've just been comparing a search at DSpace version 1.6 with a search at
1.8 and notice that at 1.8 an apostrophe is treated as a token
delimiter, so a search term of O'Connor is split into O and
Connor, whereas at 1.6 it was treated as one token. I presume it was a
conscious change made at some point and I was just wondering when and
where (in terms of the source code). Its not a problem for me I just
need to be able to provide an explanation to the repository administrator.
Thanks, Robin.
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Re: [Dspace-tech] Apostrophes in searches
I think it could be a change in Solr's behavior, not necessarily in our configuration, see: http://wiki.apache.org/solr/AnalyzersTokenizersTokenFilters#solr.StandardTokenizerFactory What Solr version did we use in 1.6? Regards, ~~helix84 -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct ___ DSpace-tech mailing list DSpace-tech@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dspace-tech
Re: [Dspace-tech] Apostrophes in searches
On Thu, Nov 1, 2012 at 5:37 PM, Robin Taylor robin.tay...@ed.ac.uk wrote: Actually its the old Lucene search I'm looking at, but I suspect you could be right in that it may well be the underlying Lucene code that changed. I'm just assuming that someone has already noticed this difference and can point me in the right direction. One quickly forgets changes for the better, but remembers changes for the best. Hmm, I should start writing fortune cookies. So in DSpace 1.6, there was Lucene 2.3.0, in 1.8, there was 3.3.0. 1) look at the changes in Lucene: http://lucene.apache.org/core/old_versioned_docs/versions/3_3_0/changes/Changes.html 2) look at Lucene changes in DSpace: git diff dspace-1_6_x dspace-1_8_x dspace-api/src/main/java/org/dspace/search/ Good luck :) Regards, ~~helix84 -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct ___ DSpace-tech mailing list DSpace-tech@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dspace-tech
Re: [Dspace-tech] Apostrophes in searches
On Thu, Nov 1, 2012 at 6:01 PM, helix84 heli...@centrum.sk wrote: One quickly forgets changes for the better, but remembers changes for the best. Hmm, I should start writing fortune cookies. s/best/worse/ Regards, ~~helix84 -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct ___ DSpace-tech mailing list DSpace-tech@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dspace-tech
