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Date: Fri, 15 Oct 2010 09:06:32 -0400 (EDT)
From: "Yonik Seeley (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Subject: [jira] Commented: (SOLR-153) Facet Index
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    [ https://issues.apache.org/jira/browse/SOLR-153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12921337#action_12921337 ] 

Yonik Seeley commented on SOLR-153:
-----------------------------------

Hmmm, yes, their "Bitset Tree" is what I've done here.
It looks like my work pre-dates their work, but I guess they were unaware of this issue.

> Facet Index
> -----------
>
>                 Key: SOLR-153
>                 URL: https://issues.apache.org/jira/browse/SOLR-153
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Yonik Seeley
>         Attachments: facettree.patch, facettree.patch
>
>
> A facet index, initially for non-hierarchical facets.
> Start with all terms, and a set of documents for each term.  Group lower level nodes by taking the union of the sets, but keep track of the largest set going back all the way to the leaves (the max doc-freq for that node).

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