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Date: Wed, 13 Oct 2010 18:24:33 -0400 (EDT)
From: "Tom Burton-West (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Subject: [jira] Commented: (SOLR-1715) Externally Generated Filters
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    [ https://issues.apache.org/jira/browse/SOLR-1715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12920786#action_12920786 ] 

Tom Burton-West commented on SOLR-1715:
---------------------------------------


+1 for work on this feature.

Other use cases include :
  1) creating custom sub-collections of documents (Example that won't scale without this issue being addressed :  http://babel.hathitrust.org/cgi/mb?a=listcs)
2) tagging documents 
3) anything that might need querying a relational database (i.e. complex joins) 
4) sort of an alternative to implementation of incremental field update in lucene/solr (i.e. updated fields stored outside of lucene/solr)

Tom Burton-West

> Externally Generated Filters
> ----------------------------
>
>                 Key: SOLR-1715
>                 URL: https://issues.apache.org/jira/browse/SOLR-1715
>             Project: Solr
>          Issue Type: New Feature
>          Components: search
>            Reporter: Grant Ingersoll
>            Priority: Minor
>             Fix For: Next
>
>
> I'd like to have a way of loading document filters from externally generated sources.  For instance, I may have run a clustering task over my corpus and the results may be stored in HDFS (Hadoop).  A given cluster will have a centroid and a bunch of points that are in the cluster.  The points are labeled by doc id (the Solr doc id) from the index.  
> Another example is I may have an external security system that can provide info on which documents are available to a user.

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