text/html charset levellevel (text/html) x-type version charset パラメーターを指定することが極めて望ましいでしょう。
x-type=mhonarc
x-type=pipermail
charset パラメーターの指定を元に
charset 引数 (2) Content-Type の charset 引数 (3) 呼び出し元に
level1 と 2
が指定出来、 2 が既定値でした。
2.0 のような値を入れるのでしょうか。
text/html; version=2.0 text/html; version=3.2 text/html; version=4.0 text/html; version=4.01 text/html; version=5
text/html を使うのは不適切です。
application/htatext/webviewhtmltext/x-server-parsed-htmltext/x-server-parsed-html3text/x-htmltext/x-html が使われたこともありました。
この点において SGML との整合性のために、 初期の HTML 仕様では MIME の媒体型指定が文書型宣言を暗示しているとこじつけています。
text/html; version =3.0
であればこの文書型宣言を暗示するとされています
(The Structure of HTML 3.0 Documents 参照)。text/html
としても良いとしています。
XHTML Media Types text/html にしてもよく、従っていない場合やそれ以外の
text/html
が使われています。これは、 application/xhtml+xml
を
私見では、 1.0 以外の XHTML 1 であっても、
互換性の手引きに従っていて、実際 text/html と札付けしても問題ないと思います。
(ほとんど違いのない XHTML 1.0 Strict ではよくて、
XHTML 1.1 では駄目というのは不条理でしょう。
text/html で送るなという話。
text/html で送るなとくどく書かれているのはこういう訳か。
(
互換性指針のいくつかの問題について、
(
2007-03-20 02:29:14 +09:00 版)
xhtml-basic/Overview.mhtml - diff - 1.21.2.61 (2007-03-26 16:53:21 +09:00 版)
Changed media type as per meeting on 21 March 2007.
元に戻りました。
(
xhtml-basic/Overview.mhtml - diff - 1.21.2.61 (2007-03-26 16:53:21 +09:00 版)
Changed media type as per meeting on 21 March 2007.
元に戻りました。
(
2007-02-16 23:52:17 +09:00 版)
2007-04-02 22:16:44 +09:00 版)
To short circuit it, this was my editorial error.
(
2007-04-08 12:36:21 +09:00 版)
2007-04-28 12:35:35 +09:00 版)
やれやれ。
An HTML user agent allows users to interact with resources which have HTML representations. At a minimum, it must allow users to examine and navigate the content of HTML level 1 documents. HTML user agents should be able to preserve all formatting distinctions represented in an HTML document, and be able to simultaneously present resources referred to by IMG elements (they may ignore some formatting distinctions or IMG resources at the request of the user). Level 2 HTML user agents should support form entry and submission.
HTML IMG 要素が参照している資源を表現することが出来るべきです
(UA は利用者の要求で整形上の差異や IMG
資源を無視しても構いません)。
This specification defines the Internet Media Type [IMEDIA] (formerly referred to as the Content Type [MIME]) called `text/html'. The following is to be registered with [IANA].
この仕様書は text/html という
The optional parameters are defined as follows:
省略可能
Level
The level parameter specifies the feature set used in the document. The level is an integer number, implying that any features of same or lower level may be present in the document. Level 1 is all features defined in this specification except those that require the <FORM> element. Level 2 includes form processing. Level 2 is the default.
level level は1つの整数で、
文書中にはその数値以下の<FORM>
Charset
The charset parameter (as defined in section 7.1.1 of RFC 1521[MIME]) may be given to specify the character encoding scheme used to represent the HTML document as a sequence of octets. The default value is outside the scope of this specification; but for example, the default is `US-ASCII' in the context of MIME mail, and `ISO-8859-1' in the context of HTTP [HTTP].
charset US-ASCII
ですし、 HTTP の文脈では ISO-8859-1 です。
A message entity with a content type of `text/html' represents an HTML document, consisting of a single text entity. The `charset' parameter (whether implicit or explicit) identifies a character encoding scheme. The text entity consists of the characters determined by this character encoding scheme and the octets of the body of the message entity.
が text/htmlのは一つの で構成される HTML 文書を表します。 charsetは (暗示であれ明示であれ) 文字符号化方式を識別します。 この文字符号化方式で決定される文字と の のオクテットで は構成されます。
To facilitate experimentation and interoperability between implementations of various versions of HTML, the installed base of HTML user agents supports a superset of the HTML 2.0 language by reducing it to HTML 2.0: markup in the form of a start-tag or end-tag, whose generic identifier is not declared is mapped to nothing during tokenization. Undeclared attributes are treated similarly. The entire attribute specification of an unknown attribute (i.e., the unknown attribute and its value, if any) should be ignored. On the other hand, references to undeclared entities should be treated as data characters.
For example:
<div class=chapter><h1>foo</h1><p>...</div>
=> <H1>,"foo",</H1>,<P>,"..."
xxx <P ID=z23> yyy
=> "xxx ",<P>," yyy
Let α & β be finite sets.
=> "Let α & β be finite sets."Support for notifying the user of such errors is encouraged.
Information providers are warned that this convention is not binding: unspecified behavior may result, as such markup does not conform to this specification.
SGML specifies that a text entity is a sequence of records, each beginning with a record start character and ending with a record end character (code positions 10 and 13 respectively) (section 7.6.1, "Record Boundaries" in [SGML]).
SGML は10 と 13 です。
(SGML の7.6.1節「記録の境界」訳注: JIS X 4151-1992 では6.6.1 参照。)
[MIME] specifies that a body of type `text/*' is a sequence of lines, each terminated by CRLF, that is, octets 13, 10.
MIME はtext/* の13 及び 10
で終端されます。
In practice, HTML documents are frequently represented and transmitted using an end of line convention that depends on the conventions of the source of the document; frequently, that representation consists of CR only, LF only, or a CR LF sequence. Hence the decoding of the octets will often result in a text entity with some missing record start and record end characters.
実際には、 HTML 文書は文書の出典の環境に依存した行末記法を使ってよく表現されます。
それは CR だけであったり LF だけであったり CR LF であったりします。
従ってオクテットの復号の時に
Since there is no ambiguity, HTML user agents are encouraged to infer the missing record start and end characters.
曖昧さはありませんから、 HTML
An HTML user agent should treat end of line in any of its variations as a word space in all contexts except preformatted text. Within preformatted text, an HTML user agent should treat any of the three common representations of end-of-line as starting a new line.
HTML
text/html を定義しています。
それによれば、引数は charset
(省略可能、指定することを推奨) だけ、
charset 引数の既定値は
XHTML Documents which follow the guidelines set forth in Appendix C, "HTML Compatibility Guidelines" may be labeled with the Internet Media Type "text/html" [RFC2854], as they are compatible with most HTML browsers.
附属書 C 『
HTML互換性指針 』に示した指針に従ったXHTML 文書 は、ほとんどの HTMLブラウザ と互換ですから、text/htmlで札付けしても構いません (may )。
Content_Type => 'text/html; version=3.2',