Re: [Slim] Eric Rescorla's No Objection on draft-ietf-slim-negotiating-human-language-19: (with COMMENT)

Eric Rescorla <ekr@rtfm.com> Sun, 07 January 2018 02:55 UTC

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From: Eric Rescorla <ekr@rtfm.com>
Date: Sat, 6 Jan 2018 18:55:11 -0800
Message-ID: <CABcZeBNQLuaMLa3=gWqaYHL_ynQ1t+HRtsgEebCRORm+OUA0iw@mail.gmail.com>
To: Bernard Aboba <bernard_aboba@hotmail.com>
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Subject: Re: [Slim] Eric Rescorla's No Objection on draft-ietf-slim-negotiating-human-language-19: (with COMMENT)
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On Sat, Jan 6, 2018 at 6:46 PM, Bernard Aboba <bernard_aboba@hotmail.com>
wrote:

> On Jan 6, 2018, at 17:39, Eric Rescorla <ekr@rtfm.com> wrote:
> >
> > 2. The negotiation structure here does not match that which is
> > conventionally used with SDP, where each side indicates the formats it
> > is prepared to receive and the other side can send any of them. Why
> > did you use this structure?
>
> [BA] Thank you for your review.
>
> For disabled users, the capabilities may not be symmetric.


But this is true for ordinary SDP as well. I might be able to receive H.264
but not send it.

-Ekr


> For example, a user might be speech-impaired but not hearing impaired. So
> they might be able to receive English audio, but only able to send American
> Sign Language (ASL) within a video stream or written American English in a
> text stream.
>
> IMHO, this should probably be explained early in the document.