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https://issues.apache.org/jira/browse/SOLR-792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12897513#action_12897513
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Hoss Man commented on SOLR-792:
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i'm with grant ... i had an IRC conversation with erik a while back where i
pointed out that there isn't anything intrinsicly "tree" oriented about this
patch -- it can be used in cases where you've got multiple fields expressing a
tree structure, but it can also be useful for fields that are totally
orthogincal to eachother (ie: the "cat" and "inStock" example)
What this is essentially doing is treating each field as a vector containing
the constraint counts for that field, and taking a "cross product" to produce
an N-dimensional matrix showing the counts for each permutation. Which led to
my suggestion for "matrix faceting" or "cross product faceting"
The other way to look at it is that it's "Decision Tree Faceting" in that it
tells you "for facet A, the constraints/counts are X/N, Y/M, etc.... if you
were to constrain A by X, then the constraint counts for B would be S/P, T/Q,
etc... ie: it tells you in advance what the "next" set of facet results would
be for a field if you apply a constraint from the current facet results.
but calling it just "Tree Faceting" seems missleading to me. that seems more
applicable to something like SOLR-64
> Tree Faceting Component
> -----------------------
>
> Key: SOLR-792
> URL: https://issues.apache.org/jira/browse/SOLR-792
> Project: Solr
> Issue Type: New Feature
> Reporter: Erik Hatcher
> Assignee: Erik Hatcher
> Priority: Minor
> Attachments: SOLR-792.patch, SOLR-792.patch, SOLR-792.patch,
> SOLR-792.patch, SOLR-792.patch, SOLR-792.patch
>
>
> A component to do multi-level faceting.
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