Question:
Complete list of DOCTYPE for HTML and XHTML?
Asked by:
Please tell me all of DOCTYPEs that are possible for HTML.
I know this one:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
Are there any specifics in HTML in the rest of doctypes.
I know this one:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
Are there any specifics in HTML in the rest of doctypes.
Answer by:
How to choose a DOCTYPE
Each HTML text document must have a document type declaration. The "DOCTYPE" should stay at the very beginning of the HTML document and tells a validator which version of HTML to use when checking the document's syntax.
The following DOCTYPEs are commonly used:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
This declares the document to be HTML 4.01 Strict. HTML 4.01 Strict is a somehow trimmed version of HTML 4.01 that emphasizes on the structure instead of presentation. Deprecated elements and attributes (including most presentational attributes), frames, and link targets are not allowed in HTML 4 Strict. By writing to HTML 4 Strict, writers can make accessible, structurally rich HTML documents that easily adapt to style sheets and different browsing situations. However, HTML 4 Strict documents may look poor on very old browsers that lack support for CSS style sheets.
The newer browsers such as Internet Explorer 5 for Mac, Netscape 6, and Mozilla use a standards-compliant rendering for HTML 4 Strict documents. These browsers use a "quirks" mode for most other document types to emulate rendering bugs in older browsers.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
This declares the document to be HTML 4.01 Transitional. HTML 4 Transitional includes all elements and attributes of HTML 4 Strict but adds presentational attributes, deprecated elements, and link targets.
Newer browsers such as Internet Explorer 5 for Mac, Netscape 6, and Mozilla use a standards-compliant rendering for HTML 4.01 Transitional documents that include the URI of the DTD in the DOCTYPE. These browsers use a "quirks" mode to emulate rendering bugs in older browsers if the URI is omitted:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN"
"http://www.w3.org/TR/html4/frameset.dtd">
This doctype declares the document to be HTML 4.01 Frameset. HTML 4 Frameset is a variant of HTML 4 Transitional for documents that use frames.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
This declares the document to be XHTML 1.0 Strict. XHTML 1.0 Strict is an XML version of HTML 4 Strict. Every tag should be closed like in common XML document.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
This declares the document to be XHTML 1.0 Transitional. XHTML 1.0 Transitional is an XML version of HTML 4 Transitional. Every tag should be closed like in common XML document.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
This declares the document to be XHTML 1.0 Frameset. XHTML 1.0 Frameset is an XML version of HTML 4 Frameset. Every tag should be closed like in common XML document.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
This declares the document to be HTML 3.2. HTML 3.2 is well supported by most browsers in use. However, HTML 3.2 has limited support for style sheets and no support for HTML 4 features such as frames and internationalization.
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
This declares the document to be HTML 2.0. HTML 2.0 is widely supported by browsers but lacks support for tables, frames, and internationalization, and many other commonly used presentational elements and attributes.
Each HTML text document must have a document type declaration. The "DOCTYPE" should stay at the very beginning of the HTML document and tells a validator which version of HTML to use when checking the document's syntax.
The following DOCTYPEs are commonly used:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
This declares the document to be HTML 4.01 Strict. HTML 4.01 Strict is a somehow trimmed version of HTML 4.01 that emphasizes on the structure instead of presentation. Deprecated elements and attributes (including most presentational attributes), frames, and link targets are not allowed in HTML 4 Strict. By writing to HTML 4 Strict, writers can make accessible, structurally rich HTML documents that easily adapt to style sheets and different browsing situations. However, HTML 4 Strict documents may look poor on very old browsers that lack support for CSS style sheets.
The newer browsers such as Internet Explorer 5 for Mac, Netscape 6, and Mozilla use a standards-compliant rendering for HTML 4 Strict documents. These browsers use a "quirks" mode for most other document types to emulate rendering bugs in older browsers.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
This declares the document to be HTML 4.01 Transitional. HTML 4 Transitional includes all elements and attributes of HTML 4 Strict but adds presentational attributes, deprecated elements, and link targets.
Newer browsers such as Internet Explorer 5 for Mac, Netscape 6, and Mozilla use a standards-compliant rendering for HTML 4.01 Transitional documents that include the URI of the DTD in the DOCTYPE. These browsers use a "quirks" mode to emulate rendering bugs in older browsers if the URI is omitted:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN"
"http://www.w3.org/TR/html4/frameset.dtd">
This doctype declares the document to be HTML 4.01 Frameset. HTML 4 Frameset is a variant of HTML 4 Transitional for documents that use frames.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
This declares the document to be XHTML 1.0 Strict. XHTML 1.0 Strict is an XML version of HTML 4 Strict. Every tag should be closed like in common XML document.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
This declares the document to be XHTML 1.0 Transitional. XHTML 1.0 Transitional is an XML version of HTML 4 Transitional. Every tag should be closed like in common XML document.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
This declares the document to be XHTML 1.0 Frameset. XHTML 1.0 Frameset is an XML version of HTML 4 Frameset. Every tag should be closed like in common XML document.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
This declares the document to be HTML 3.2. HTML 3.2 is well supported by most browsers in use. However, HTML 3.2 has limited support for style sheets and no support for HTML 4 features such as frames and internationalization.
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
This declares the document to be HTML 2.0. HTML 2.0 is widely supported by browsers but lacks support for tables, frames, and internationalization, and many other commonly used presentational elements and attributes.
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