> What we really want is, in order of largest to smallest.
> 
> anyField   (any field in the underlying data, indexed or not)
> anyKnown   (any field indexed, not necessarily in CQL)
> anyIndex   (any field with a CQL Index == current cql.anywhere)

Do we still need server-choice? I'd always interpreted the different
between this and anywhere/anyIndex to be that anywhere would search all
indexes whereas serverchoice would search only one index (somehow
appropriately or inappropriate chosen by the server). 

Personally I'd like to see it go - I don't want any indeterminate "and
the server will do the appropriate thing" in SRW ;-)

Matthew