"Matt Magoffin" <postgresql.org@msqr.us> writes:
> 2) Even if I could have an xpath() result return an array with multiple
> values, like {value1,value2,value3} I wasn't able to define a GIN index
> against the xml[] type. Should this be possible?
Dunno about your other questions, but the answer to this one is "no"
--- AFAICS there is no indexing support of any kind for the xml type
in 8.3. Try casting to text[] instead.
regards, tom lane