F402: Named column joins for LOBs, arrays, and multisets
F442: Mixed column references in set functions
J???: Stuff in SQL/JRT (SQL Routines and Types for the Java Programming Language)
M???: Stuff in SQL/MED (Management of External Data)
P???: Stuff in SQL/PSM (Persistent Stored Modules)

Assumed S025-S028 "NO", because S023 already set to NO.

Does PostgreSQL conform to SQL/CLI (feature ID C011)?

About http://developer.postgresql.org/beta-history.txt :
 - Does "Allow composite types as table columns (Tom)"
   improve conformance, somehow?