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From Uwe Schindler <...@thetaphi.de>
Subject Re: Ranged Query
Date Wed, 03 Apr 2013 12:10:21 GMT




"Osullivan L." <L.Osullivan@swansea.ac.uk> schrieb:

>Greetings,
>
>I have a custom analyzer which converts Library of Congress Callnumbers
>into normalized strings:
>
><fieldType name="LCNormalized" class="solr.TextField"
>sortMissingLast="true" omitNorms="true">
>      <analyzer>
>        <tokenizer class="solr.KeywordTokenizerFactory"/>
>   <filter class="org.vufind.solr.analysis.LCCNormalizeFilterFactory"/>
>      </analyzer>
>    </fieldType>
><field name="callnumber-normalized" type="LCNormalized" indexed="true"
>stored="true" />
>
>Thus, values like:
>
>PQ239.Z56
>PQ239.H63 2008
>PQ239.S62 1982
>PQ239.B68 1983
>PQ2390.S35 A5
>PQ2390.S35 B8 1898
>PQ2389 .R65 F3 1854 t.1
>PQ239.A7 1969
>PQ2.N6 1959
>PQ22.A4 D47 1949
>PQ238.L57 1985
>
>become:
>
>PQ 0239.000000 Z0.560000
>PQ 0239.000000 H0.630000 002008
>PQ 0239.000000 S0.620000 001982
>PQ 0239.000000 B0.680000 001983
>PQ 2390.000000 S0.350000 A0.500000
>PQ 2390.000000 S0.350000 B0.800000 001898
>PQ 2389.000000 R0.650000 F0.300000 001854 T.000001
>PQ 0002.000000 N0.600000 001959
>PQ 0022.000000 A0.400000 D0.470000 001949
>PQ 0238.000000 L0.570000 001985
>
>This allows items to be accurately sorted by callnumber.
>
>I would also like to perform ranged searches on the normalised
>callnumber but whereas callnumber-normalized=[DS+TO+FE] will correctly
>list items with callnumbers between DS and FE, starting with DT* and
>finishing with FD* , callnumber-normalized=[DS763+TO+FE] incorrectly
>starts at DT* and finishes with FD*.
>
>Can anyone explain why this might be the case?
>
>Looking at
>http://wiki.apache.org/solr/MultitermQueryAnalysis#Current_components_that_implement_MultiTermAwareComponent,
>would I have to add one of the MultiTermAware Factories to make this
>work?
>
>Thanks,
>
>Luke
>
>--
>Luke O'Sullivan
>Systems Developer
>Web Team
>Swansea University, Singleton Park, Swansea SA2 8PP, UK
>l.osullivan@swansea.ac.uk<mailto:l.osullivan@swansea.ac.uk>
>01792 602772
>@l_os_cymru

--
Uwe Schindler
H.-H.-Meier-Allee 63, 28213 Bremen
http://www.thetaphi.de
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