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From "Mike Perham (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-1536) Support for TokenFilters that may modify input documents
Date Thu, 11 Feb 2010 14:20:28 GMT

    [ https://issues.apache.org/jira/browse/SOLR-1536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12832493#action_12832493
] 

Mike Perham commented on SOLR-1536:
-----------------------------------

This would be hugely useful for us in implementing a profanity detector.  We'd like to scan
the 'content' field for profane tokens and mark a boolean 'safe' field with the results.

> 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
>
>
> 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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