[Slim] Multi-lines and offer/answer questions on draft-ietf-slim-negotiating-human-language

Gunnar Hellström <gunnar.hellstrom@omnitor.se> Tue, 13 June 2017 05:51 UTC

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Subject: [Slim] Multi-lines and offer/answer questions on draft-ietf-slim-negotiating-human-language
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A couple of questions on draft-ietf-slim-negotiating-human-language.

1. How would inclusion of more than one hlang attribute of the same kind 
in a media description be handled.

a) should it be seen as an addition, so the language tags are collected 
and any asterisk governs.

b) should it replace earlier attributes of same kind in same media 
description

c) should it be "illegal"

I have a slight preference for a). Some applications might find it 
easier to insert a number of complete attributes.


2. How would inclusion of hlang attributes in an answer be handled if no 
one was included in the offer.

This assumes that the offering party supports hlang attributes bu did 
not bother to add any.

a) The offering party would act on the attributes in the answer as 
usual. (A re-Invite would be needed to get full negotiation in place if 
that was desired.)

b) The offering party would ignore it.

c) It would be seen as "illegal"

I think a) is the natural choice and is also how the current draft can 
be interpreted. In 5.2, there is a paragraph starting "In an answer..", 
not exactly requiring that attributes were included in an offer (but 
anyway talking about what was in the offer)


I suggest that some wording is included for clarification of these cases.


/Gunnar


-- 
-----------------------------------------
Gunnar Hellström
Omnitor
gunnar.hellstrom@omnitor.se
+46 708 204 288