Re: [Slim] draft-hellstrom-slim-simultaneous-modalities & modalitypref

[Paul Kyzivat <[e-mail]>]

I did a quick review of these documents. My feeling is that these have 
moved to quickly to specific solution syntax without first sorting out 
exactly what the needs are. I am sympathetic to what I think the goals 
are, but am concerned that the proposed solutions are not ideal.

For instance, simultaneous-modalities indicates the languages of the 
source form and the transformed form. But it does not indicate precisely 
which media stream contains the source form. I guess the assumption is 
that there will only be one other media stream with the appropriate 
language indication. But that is just an assumption. It may well apply 
in a number of common cases, but I'm sure we can come up with more 
complex cases where that isn't true. ISTM that it would be better to 
come up with a syntax that explicitly links the source and transformed 
media streams. (E.g. a new usage of the grouping framework.)

In the modalitypref document if find the semantics fuzzy, and the 
relationship of the use of "*" for this to be even more fuzzy when 
related to its use in draft-ietf-slim-negotiating-human-language. For 
instance, I see a potential conflict between need to express degree of 
competence with a modality with preference for that modality. It may be 
that those should be handles as two distinct indicators. Further 
discussion is needed.

	Thanks,
	Paul