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Tell me What is the <!DOCTYPE>? Is it necessary to use in HTML5

Anonymous User 5177 06 Sep 2012
html5 html5
Updated 22 Sep 2020
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Anonymous User
Anonymous User 06 Sep 2012
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The <!DOCTYPE> is an instruction to the web browser about what version of HTML the page is written in. AND The <!DOCTYPE> tag does not have an end tag and It is not case sensitive.
The <!DOCTYPE> declaration must be the very first thing in HTML5 document, before the <html> tag. As In HTML 4.01, all <! DOCTYPE > declarations require a reference to a Document Type Definition (DTD), because HTML 4.01 was based on Standard Generalized Markup Language (SGML). WHERE AS HTML5 is not based on SGML, and therefore does not require a reference to a Document Type Definition (DTD).
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