BUG #6370: manual does not discuss transactional DDL

The following bug has been logged on the website:

Bug reference: 6370
Logged by: Ryan Culpepper
Email address: ryan(at)cs(dot)utah(dot)edu
PostgreSQL version: Unsupported/Unknown
Operating system: not applicable
Description:

This is a documentation bug (or feature request), not a software bug.

There seems to be no discussion of transactional DDL in the manual itself
(that I could find). A brief Google search turned up the following relevant
pages:

-
http://wiki.postgresql.org/wiki/Transactional_DDL_in_PostgreSQL:_A_Competitive_Analysis
- http://wiki.postgresql.org/wiki/Why_PostgreSQL_Instead_of_MySQL_2009 (see
section "Transactional DDL")
- http://archives.postgresql.org/pgsql-advocacy/2007-08/msg00273.php (and
other messages in that thread)

But I could not find a place in the manual that authoritatively states that
DDL is transactional. (Such a page should probably also discuss things like
session variables, etc.)