Return value of CREATE TABLE

Is this possible?
Basically I want to manage temp table status for use in a procedure.

The procedure looks at pg_catalog to get information for processing.

So basically I would like to be able to know what namespace a temp table is
created in, so that I can constrain lookup.

example

CREATE TEMP TABLE tagdata (test int,test2 numeric(10,2));
SELECT relname,relpersistence ,relnamespace
,pa.atttypid,attname,attnum
,nspname
FROM pg_catalog.pg_class pc
JOIN pg_attribute pa ON pc.oid=pa.attrelid
JOIN pg_namespace pn ON pn.oid=relnamespace
WHERE relname = 'tagdata' AND attnum>0

Which returns (when its run for the second time in different tabs in
pgadmin)
relname persistence namespace typeid colname colnum schema
"tagdata" "p" "2200" "23" "fileid" 1
"public"
"tagdata" "p" "2200" "25" "tagname" 2 "public"
"tagdata" "p" "2200" "1009" "tagvalue" 3 "public"
"tagdata" "t" "483934" "23" "test" 1
"pg_temp_10"
"tagdata" "t" "538079" "23" "test" 1
"pg_temp_13"
"tagdata" "t" "538079" "1700" "test2" 2
"pg_temp_13"

So I would like some way of knowing exactly which schema the temp table has
been created in, I cant see anything obvious

thanks

Mike