: I don't believe index-time will be involved in this sort of
: functionality, as there's no way to know at index-time what 'tag groups'
: a given term will be in at any given time.
assuming it's a requirement that tags can be changed at any time, then no
-- an index time expansion won't cut it.
: This leads me to believe that a query request parser plugin approach
: might be best. Something that can receive queries when the relevant
: keyword is present (e.g. tag=blah) and translate the parameters into
: their current tag member equivalvents.
a QParserPlugin would probably be the simplest way ... just translate your
syntax from "tag=foo" to "fq={!tag}foo" and then register "tag" as the
name of a QParser that knows how to check your special file to translate
"foo" into some complex query.
-Hoss
