Tuesday, September 05, 2017

DOCTYPE

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At the top of an HTML file source, you may see some code that indicates the version of HTML that is going to be used.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">

The O'Reilly Net.com has a discussion:
DOCTYPE Explained.

"There are three variants on HTML 4.01, for example:
  • HTML 4.01 Strict, which describes the structural portions of HTML 4.01 and does not provide any frame-related markup.
  • HTML 4.01 Transitional, which includes the presentational markup such as >B< and >FONT<, but does not include frame-related markup.
  • HTML 4.01 Frameset, which is the same as HTML 4.01 Transitional except that it adds a description of frame-related markup."
Also:
Fix Your Site With the Right DOCTYPE!
Choosing a DOCTYPE  
The global structure of an HTML document  



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