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