I'm more comfortable with "should" rather than "must" here.
My problem with "must" for the design patterns, is that the spec doesn't seem to be specific enough about the details of the design patterns to make them such a strong requirement.
Has this changed in the DITA 1.2 drafts?
And while "should" isn't a strong as "must" it is still pretty strong and much stronger than other options such as "may".
-Jeff
-----Original Message-----
From: Eliot Kimber [mailto:ekimber@reallysi.com]
Sent: Tue 7/7/2009 7:31 AM
To: Michael Priestley; Dana Spradley
Cc: dita
Subject: Re: [dita] Conformance and interoperability
On 7/6/09 6:26 PM, "Michael Priestley"