3.3. HTML Public Text Identifiers
To identify information as an HTML document conforming to this
specification, each document must start with one of the following
document type declarations.
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
This document type declaration refers to the HTML DTD in 9.1, "HTML
DTD".
NOTE - If the body of a `text/html' message entity does not begin
with a document type declaration, an HTML user agent should infer
the above document type declaration.
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0 Level 2//EN">
This document type declaration also refers to the HTML DTD which
appears in 9.1, "HTML DTD".
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0 Level 1//EN">
This document type declaration refers to the level 1 HTML DTD in 9.3,
"Level 1 HTML DTD". Form elements must not occur in level 1
documents.
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0 Strict//EN">
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0 Strict Level 1//EN">
These two document type declarations refer to the HTML DTD in 9.2,
"Strict HTML DTD" and 9.4, "Strict Level 1 HTML DTD". They refer to
the more structurally rigid definition of HTML.
HTML user agents may support other document types. In particular,
they may support other formal public identifiers, or other document
types altogether. They may support an internal declaration subset
with supplemental entity, element, and other markup declarations.
3.4. Example HTML Document
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<!-- Here's a good place to put a comment. -->
Structural Example
First Header
This is a paragraph in the example HTML file. Keep in mind
RFC 1866 Hypertext Markup Language - 2.0 November 1995
that the title does not appear in the document text, but that
the header (defined by H1) does.
First item in an ordered list.
Second item in an ordered list.
Note that lists can be nested;
Whitespace may be used to assist in reading the
HTML source.
Third item in an ordered list.
This is an additional paragraph. Technically, end tags are
not required for paragraphs, although they are allowed. You can
include character highlighting in a paragraph. This sentence
of the paragraph is emphasized. Note that the </P>
end tag has been omitted.
<IMG SRC ="triangle.xbm" alt="Warning: ">
Be sure to read these bold instructions.
4. HTML as an Internet Media Type
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.
4.1. text/html media type
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].
Media Type name
text
=10= |
