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Re: [Sip] I-D Action:draft-ietf-sip-body-handling-03.txt



I took a look at this (actually just the diffs), and it looks fine.

I have one question after reading the additions about multipart/related:

There is talk about extensions that use multipart/related, and what they must do. This implies an assumption that iFrom sip-bounces at ietf.org Tue Aug 12 16:28:11 2008
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From: Paul Kyzivat <pkyzivat at cisco.com>
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Subject: Re: [Sip] I-D Action:draft-ietf-sip-body-handling-03.txt
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I took a look at this (actually just the diffs), and it looks fine.

I have one question after reading the additions about multipart/related:

There is talk about extensions that use multipart/related, and what they must do. This implies an assumption that it cannot be used *without* an exception. Is that the case? If so, is it also the case for other kinds of multipart?

My assumption is that, at least for multipart/mixed, no extension is required. E.g. I can just put a multipart/mixed body in my INVITE, make one body part be SDP, and others be anything I like, whether the recipient can make use of them or not.

Similarly for multipart/alternative. I *think* I should be able to take any request that currently expects a body part of some type, and put a multipart/alternative in, with one part being the expected type, and one or more other contained body parts containing what *I* consider to be alternatives. E.g. a MESSAGE with a multipart/alternative containing text/plain and text/html. And it shouldn't require any extension to MESSAGE to support that. Right?

With multipart/related I am inclined to agree that it makes no sense without some specification of what the collection is for.

Would it be good to put some words about what is/isn't required into the document?

	Thanks,
	Paul
_______________________________________________
Sip mailing list  https://www.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-implementors at cs.columbia.edu for questions on current sip
Use sipping at ietf.org for new developments on the application of sip


t cannot be used *without* an exception. Is that the case? If so, is it also the case for other kinds of multipart?

My assumption is that, at least for multipart/mixed, no extension is required. E.g. I can just put a multipart/mixed body in my INVITE, make one body part be SDP, and others be anything I like, whether the recipient can make use of them or not.

Similarly for multipart/alternative. I *think* I should be able to take any request that currently expects a body part of some type, and put a multipart/alternative in, with one part being the expected type, and one or more other contained body parts containing what *I* consider to be alternatives. E.g. a MESSAGE with a multipart/alternative containing text/plain and text/html. And it shouldn't require any extension to MESSAGE to support that. Right?

With multipart/related I am inclined to agree that it makes no sense without some specification of what the collection is for.

Would it be good to put some words about what is/isn't required into the document?

	Thanks,
	Paul
_______________________________________________
Sip mailing list  https://www.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-implementors at cs.columbia.edu for questions on current sip
Use sipping at ietf.org for new developments on the application of sip