[Ietf-not43] 3.2.3 & 3.2.5 requirements

[Andrew Newton]

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Ted Hardie wrote:
> 
> I agree that the service MUST be able to provide the pieces listed.
> I think we both agree that there are times when some elements won't
> make sense.  It may be the correct thing to do isn't to omit
> the elements, but to emit them with null values; this strategy
> can be used when an authorization threshold isn't met, the state
> doesn't usefully carry the resulting data, and so on.

Well, that is what I meant.  The schema language used needs to be able
to specify that there is a place for the value of a piece of
information, it is just not provided.  Both the LDAP and XML Schema
approaches can do this.

-andy
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