HTML Declaration(Document Types)

The document type declaration tag is first tag in your in your HTML document, before the other html tags. It is not an HTML tag; it is an instruction that gives to the web browser about which version of HTML the page we are using.

DOCTYPE Declarations

In HTML 5 version<!DOCTYPE html>

In HTML 4.01 version

This DTD consist all HTML tags. but no include deprecated tag for example  font. Frames are not allowed in this version.

<!DOCTYPE HTML PUBLIC "-//Type here.../DTD HTML 4.01//EN" >


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