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From "Bill Bell (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-1536) Support for TokenFilters that may modify input documents
Date Tue, 01 Feb 2011 21:46:29 GMT

    [ https://issues.apache.org/jira/browse/SOLR-1536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12989397#comment-12989397
] 

Bill Bell commented on SOLR-1536:
---------------------------------

This fails on the latest trunk.

> Support for TokenFilters that may modify input documents
> --------------------------------------------------------
>
>                 Key: SOLR-1536
>                 URL: https://issues.apache.org/jira/browse/SOLR-1536
>             Project: Solr
>          Issue Type: New Feature
>          Components: Schema and Analysis
>    Affects Versions: 1.5
>            Reporter: Andrzej Bialecki 
>         Attachments: altering.patch, altering.patch, altering.patch
>
>
> In some scenarios it's useful to be able to create or modify fields in the input document
based on analysis of other fields of this document. This need arises e.g. when indexing multilingual
documents, or when doing NLP processing such as NER. However, currently this is not possible
to do.
> This issue provides an implementation of this functionality that consists of the following
parts:
> * DocumentAlteringFilterFactory - abstract superclass that indicates that TokenFilter-s
created from this factory may modify fields in a SolrInputDocument.
> * TypeAsFieldFilterFactory - example implementation that illustrates this concept, with
a JUnit test.
> * DocumentBuilder modifications to support this functionality.

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