Procedural languages

• plprolog procedural language.
• javascript procedural language. good for xml stuff. good interpreters available.
• sparql procedural language, for querying RDF triples
• ocaml procedural language

Types (not domains)

• flags base type - one char per flag, functions flag_set (+ operator), flag_clear(- operator), flag_test
• keywords type - space separated keywords; test for keyword
• uri base type - handle path concatenation ( // operator)

Utilities

• xpg_dump - advanced SQL shema dump
• xpg_package - easily manage PostgreSQL extensions
• xpg_diff - schema comparator/updater
• xpg_datalink - SQL/MED datalink type (and file management)