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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-1279) ApostropheTokenizer
Date Tue, 14 Jul 2009 20:57:14 GMT

    [ https://issues.apache.org/jira/browse/SOLR-1279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12731125#action_12731125
] 

Robert Muir commented on SOLR-1279:
-----------------------------------

Sergey, have you looked at SOLR-1266?

By using the new stemEnglishPossessive=0 option, I think you can get the same behavior with
WordDelimiterFilter, if you use preserveOriginal=1 along with catenateWords=1


> ApostropheTokenizer
> -------------------
>
>                 Key: SOLR-1279
>                 URL: https://issues.apache.org/jira/browse/SOLR-1279
>             Project: Solr
>          Issue Type: New Feature
>          Components: Analysis
>            Reporter: Sergey Borisov
>            Priority: Minor
>             Fix For: 1.4
>
>         Attachments: ApostropheTokenizer.zip
>
>
> ApostropheTokenizer creates extra tokens during the analysis stage for the fields containing
apostrophes. The reason for adding this is to ensure that documents that differ only by apostrophe
have the same relevancy score. 
> For example, if the document contains string "McDonald's", it will be tokenized as "McDonald's
McDonalds". This way when the search is performed against "McDonald's" or "McDonalds" will
produce similar score.
> This code handles up to two apostrophes in a token.
> To use this tokenizer add the following line in schema.xml
> <analyzer type="index">
>       <filter class="org.apache.lucene.analysis.ApostropheTokenFactory"/>
> ...
> </analyzer>

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