Description
UPDM: An information on Architectural Description. It states things like what methodology, notation, etc. has been used.
MODAF/NAF: A Metadata element that applies to the whole architecture.
Architecture Framework
DoDAF, MODAF, NAF
Extensions
UML Comment
Related DoDAF views
AV-1 Overview and Summary Information
Related MODAF views
AV-1 Overview and Summary Information
Related NAF views
NAV-1 Overview and Summary Information