SQL standard for TRUNCATE

According to http://www.postgresql.org/docs/9.1/static/unsupported-features-sql-standard.html, PostgreSQL doesn't support identity column restart for TRUNCATE.  This might strictly be true because PostgreSQL doesn't implement identity columns as such, but it does support RESTART IDENTITY and CONTINUE IDENTITY, which will apply to sequences, and those are equivalent.  If it's going to say F202 is unsupported, shouldn't there at least be a note acknowledging this feature is supported for sequences, but otherwise it doesn't apply?  Some attempt to implement this has been made.