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What can DTD do for me?

Posted on 1998-06-25
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Last Modified: 2013-11-19
Is DTD(document type declaration)used by the browser or is it used only by validation services?  I'm considering adding <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0
Frameset//EN" "http://www.w3.org/TR/REC-html40/frameset.dtd"> to a frames page.  Is this a good idea?
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Question by:jerlands
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Michel Plungjan earned 300 total points
ID: 1844390
I only used doctype for validators but since I am using HOMESITE with validation built-in, I have stopped using it. The strange thing is that a lot of people include one and then immediately ignores it and violate it.

    If you insist, here is what IRT says:

A DOCTYPE statement (or DTD), located on the first line of an HTML document, designates the standard of HTML which you have chosen to use.

HTML Validators require DTD statements. Without a DTD, they will usually fall back to a default DTD (many times HTML 2.0), most times causing many errors.

Three common DTDs are:

    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN"> for HTML 4.0
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> for HTML 3.2
    <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"> for HTML 2.0

There are many more DTD statements available for use...

Try http://www.ccs.org/html/dtd/  and http://www.ccs.org/html/dtd/why/index.html 
for more info

Michel
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