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**KoOL** · 04-15-2008, 05:17 PM

HTML <!DOCTYPE> tag

Definition and Usage

The <!DOCTYPE> declaration is the very first thing in your document, before the <html> tag. This tag tells the browser which HTML or XHTML specification the document uses.
Tips and Notes

Note: The <!DOCTYPE> tag does not have an end tag!
HTML

HTML 4.01 specifies three document types: Strict, Transitional, and Frameset.
HTML Strict DTD

Use this when you want clean markup, free of presentational clutter. Use this together with Cascading Style Sheets (CSS):

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> HTML Transitional DTD

The Transitional DTD includes presentation attributes and elements that W3C expects to move to a style sheet. Use this when you need to use HTML's presentational features because your readers don't have browsers that support Cascading Style Sheets (CSS):
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> Frameset DTD

The Frameset DTD should be used for documents with frames. The Frameset DTD is equal to the Transitional DTD except for the frameset element replaces the body element:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
XHTML

XHTML 1.0 specifies three XML document types: Strict, Transitional, and Frameset.
XHTML Strict DTD

Use this DTD when you want clean markup, free of presentational clutter. Use this together with Cascading Style Sheets (CSS):
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> XHTML Transitional DTD

Use this DTD when you need to use XHTML's presentational features because your readers don't have browsers that support Cascading Style Sheets (CSS):
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> XHTML Frameset DTD

Use this DTD when you want to use frames!
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd"> To check that you have written a valid XHTML document with a correct DTD, you can link your XHTML page to an XHTML validator.
Attributes: NONE

04-15-2008, 05:17 PM	#8 (permalink)
KoOL User Info Join Date: Oct 2007 Location: In Your Mind Age: 27 Achievements Posts: 11,081 Casino Cash: $1187430 Total Points: 239,825,816,542.72 Donate Awards Showcase Total Awards: 1	HTML <!DOCTYPE> tag Definition and Usage The <!DOCTYPE> declaration is the very first thing in your document, before the <html> tag. This tag tells the browser which HTML or XHTML specification the document uses. Tips and Notes Note: The <!DOCTYPE> tag does not have an end tag! HTML HTML 4.01 specifies three document types: Strict, Transitional, and Frameset. HTML Strict DTD Use this when you want clean markup, free of presentational clutter. Use this together with Cascading Style Sheets (CSS): <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> HTML Transitional DTD The Transitional DTD includes presentation attributes and elements that W3C expects to move to a style sheet. Use this when you need to use HTML's presentational features because your readers don't have browsers that support Cascading Style Sheets (CSS): <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> Frameset DTD The Frameset DTD should be used for documents with frames. The Frameset DTD is equal to the Transitional DTD except for the frameset element replaces the body element: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd"> XHTML XHTML 1.0 specifies three XML document types: Strict, Transitional, and Frameset. XHTML Strict DTD Use this DTD when you want clean markup, free of presentational clutter. Use this together with Cascading Style Sheets (CSS): <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> XHTML Transitional DTD Use this DTD when you need to use XHTML's presentational features because your readers don't have browsers that support Cascading Style Sheets (CSS): <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> XHTML Frameset DTD Use this DTD when you want to use frames! <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd"> To check that you have written a valid XHTML document with a correct DTD, you can link your XHTML page to an XHTML validator. Attributes: NONE
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