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Subject: RE: [dita] MUST, SHOULD, and MAY, some key words from RFC 2119

MUST means that an implementer MUST provide this default behavior.

I think the alternative is to render specialization powerless to introduce new behaviors that conflict with the base. Which, given that half the motivation for specialization is to do something beyond what the base does, would render useless about half the specializations already out there.

Also note that the existing spec, since 1.0, has a whole section on how to manage processing overrides. If we want to disallow processing overrides, that's a funny thing to have in the spec.

One of the main points of specialization is that all behavior is default, and may be overridden by a specializer. This is nothing new, so I think/hope we're just talking past each other.

Michael Priestley
Lead IBM DITA Architect

"Grosso, Paul" <pgrosso@ptc.com>

10/02/2007 02:23 PM

RE: [dita] MUST, SHOULD, and MAY, some key words from RFC 2119

If I'm not misunderstanding what you're saying, Michael, that is the most unusual definition of "standard" I have ever seen in my quarter century of working on standards.
Then what does it mean to be MUST in the core DITA standard?
More to the point, what is the core DITA standard standardizing?

From: Michael Priestley [mailto:mpriestl@ca.ibm.com]
Tuesday, 2007 October 02 13:15
Ogden, Jeff
Re: [dita] MUST, SHOULD, and MAY, some key words from RFC 2119

Looks good, Jeff - with the caveat though that even though the core is MUST and the specializations are RECOMMENDED or OPTIONAL, a specialization may introduce behavior that overrides the core.

In other words, all behavior, core and specialized, is overrideable.

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