3.3. HTML Public Text Identifiers
Connected: An Internet Encyclopedia
3.3. HTML Public Text Identifiers
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Requests For Comments
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RFC 1866
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3. HTML as an Application of SGML
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Next: 3.4. Example HTML Document
3.3. HTML Public Text Identifiers
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.
Next: 3.4. Example HTML Document
Connected: An Internet Encyclopedia
3.3. HTML Public Text Identifiers
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