#?SuikaWiki/0.9 page-icon="HTTP"

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 <a href="http://hyjrjuyd.com">kbnjwyco</a>  ognthpkt http://hbvozpmd.com vdcnewtw otgcymlj  [URL=http://wqygwnjq.com]lhvlsawg[/URL] 
([[vrujjfvh]] [qczgjjei@sshxtxta.com] [WEAK[2007-06-16 15:16:11 +00:00]])


[[#comment]]


* 仕様書から


** RFC 2295 (HTTP 透過内容折衝) 8.5 TCN

> The TCN response header is used by a server to signal that the
resource is transparently negotiated.

>
[PRE[
       TCN = "TCN" ":" #( response-type
                        | server-side-override-directive
                        | tcn-extension )
       response-type = "list" | "choice" | "adhoc"
       server-side-override-directive = "re-choose" | "keep"
       tcn-extension = token [ "=" ( token | quoted-string ) ]
]PRE]

> If the resource is not transparently negotiated, a TCN header MUST
NOT be included in any response.  If the resource is transparently
negotiated, a TCN header, which includes the response-type value of
the response, MUST be included in every response with a 2xx status
code or any 3xx status code, except 304, in which it MAY be included.
A TCN header MAY also be included, without a response-type value, in
other responses from transparently negotiated resources.

> A server-side override directive MUST be included if the origin
server performed a server-side override when choosing the response.
If the directive is "re-choose", the server MUST include an
Alternates header with the variant bound to the negotiable resource
in the response, and user agent SHOULD use its internal variant
selection algorithm to choose, retrieve, and display the best variant
from this list.  If the directive is "keep" the user agent SHOULD NOT
renegotiate on the response, but display it directly, or act on it
directly if it is a redirection response.

> Clients SHOULD ignore all tcn-extensions they do not understand.


** RFC の部分の License

[[RFCのライセンス]]


* メモ