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From "Hoss Man (JIRA)" <>
Subject [jira] Commented: (SOLR-792) Tree Faceting Component
Date Wed, 11 Aug 2010 23:55:34 GMT


Hoss Man commented on SOLR-792:

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:
>             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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