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Date: Mon, 23 Sep 2019 19:08:02 -0700
From: Kazuho Oku <notifications@github.com>
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Subject: Re: [quicwg/base-drafts] Disconnect version number from draft number
 (#3062)
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@LPardue I'm not sure it sidesteps. Instead, I think it might turn out as a practical way of testing the "quic" attribute of Alt-Svc.

Wire versions of the transport and the application protocol would not change in the same versions. Consider the case where http-24 remains wire-compatible with -23 (hence ALPN=h3-23), while the transport-24 making breaking changes.

In such case, to avoid the use of VN, the server _is_ going to send `Alt-Svc: h3-23=":443"; quic="ff000018"`.

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<p><a class="user-mention" data-hovercard-type="user" data-hovercard-url="/hovercards?user_id=6571445" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/LPardue">@LPardue</a> I'm not sure it sidesteps. Instead, I think it might turn out as a practical way of testing the "quic" attribute of Alt-Svc.</p>
<p>Wire versions of the transport and the application protocol would not change in the same versions. Consider the case where http-24 remains wire-compatible with -23 (hence ALPN=h3-23), while the transport-24 making breaking changes.</p>
<p>In such case, to avoid the use of VN, the server <em>is</em> going to send <code>Alt-Svc: h3-23=":443"; quic="ff000018"</code>.</p>

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