The doctype tag tells the browser what standard the page conforms to. Until now doctypes did not have to be including but with the creation of XHMTL 1.0, they must know be put in. Doctype tags go above your head tag. There are three types of doctype tags. Strict, transitional and frameset.
Strict
Strict is the hardest standard to compy with. If you add a strict doctype to your document, you can’t use deprecated tags, and traditionally a lot of websites have stayed away – but more and more are coming round to the idea of tigher standards.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
Transitional
This is the most commonly used doctype as it allows you to keep some of the old tags but still lets you move on to XHTML.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
Frameset
This is for frameset pages (as you have probably guessed).
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
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Tags: doctype, html, tags, xhtml
This entry was posted on Sunday, September 16th, 2007 at 7:41 am and is filed under Programming, Tech. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.