Note that Lucene doesn't support general in-place document updates, and
updating a document means first deleting it and adding it back.
Therefore if you only intend to add/change few categories of an existing
document, you have to fully re-index the document. This is not specific to
categories but
I'm using Lucene 4.4 with SortedSetDocValuesFacetFields and would like to add
and/or remove CategoryPaths for certain documents in the index.
Basically, as additional sets of docs are added, the CategoryPaths for some of
the previously indexed documents need to changed.
My current testing with
