[5] 
[DFN[[CODE[Archive:]]]]
[[ヘッダー]]は、
記事の[[アーカイブ]]としての長期保存・公開に関する[[投稿者]]の意思を明示するものです。


* 仕様書

[1] [CITE@en[RFC 5536 - Netnews Article Format]]
( ([TIME[2014-09-21 18:14:06 +09:00]] 版))
<http://tools.ietf.org/html/rfc5536#section-3.2.2>


* 歴史

[3] 古くから[[事実上の標準]]として
[CODE[X-No-Archive:]]
欄が使われてきました。

[4] 
[[usefor-article]]
はこれを
[CODE[Archive:]]
[[ヘッダー]]という形で[[標準化]]しました。


[FIG(quote)[ [2] [[draft-usefor-article]] (06) 6.12.  Archive

   This optional header provides an indication of the poster's intent
   regarding preservation of the article in publicly accessible long-
   term or permanent storage.

      Archive-content     = [CFWS] ("no" | "yes" ) [CFWS]
      Archive-header-parameter
                          = Filename-token "=" value
                            ; for USENET-header-parameters see 4.1
      Filename-token      = [CFWS] "filename" [CFWS]

   The presence of an "Archive: no" header in an article indicates that
   the poster does not permit redistribution from publicly accessible
   long-term or permanent archives. The absence of this header, or an
   explicit "Archive: yes", indicates that the poster is willing for
   such redistribution to take place. The optional Filename parameter
   can then be used to suggest a filename under which the article should
   be stored. Further extensions to this standard may provide additional
   parameters for administration of the archiving process.

        NOTE: This standard does not attempt to define the length of
        "long-term", since it is dependent on many factors, including
        the retention policies of individual sites, and the customs or
        policies established for particular newsgroup or hierarchies.

        NOTE: Posters are cautioned that some sites may not implement
        the "no" option of the Archive header correctly. In some
        jurisdictions non-compliance with this header may constitute a
        breach of copyright or of other legal provisions.  Moreover,
        even if this header prevents the poster's words from being
        archived publicly, it does nothing to prevent the archiving of a
        followup in which those words are quoted.

]FIG]

[6] [CODE[X-No-Archive:]] はよく使われていましたが、
[CODE[Archive:]]
がどれだけ使われたかは不明です。

[7] 
また、これらがどれだけ尊重されたのかも不明です。


* メモ