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https://issues.apache.org/jira/browse/SOLR-153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12921322#action_12921322
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Peter Karich commented on SOLR-153:
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Yonik, is this an implementation of the tree described here:
http://www.cs.cmu.edu/~ddash/papers/facets-cikm.pdf
??
> 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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