<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> title here </title>
</head>
<body>
</body>
</html>
The xmlns attribute in <html>, specifies the xml namespace for a document, and is required in XHTML documents.
Different types of Doctypes :
The <!DOCTYPE> declaration is the very first thing in an XHTML document, before the <html> tag. The <!DOCTYPE> declaration is not an XHTML tag; it is an instruction to the web browser about what version of the markup language the page is written in.
XHTML 1.0 Strict :
This DTD contains all html elements and attributes, but does not include presentational or deprecated elements e.g font etc. Framesets are not allowed. The markup must also be written as well-formed XML.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
XHTML 1.0 Transitional :
This DTD contains all html elements and attributes, including presentational and deprecated elements. Framesets are not allowed. The markup must also be written as well-formed XML.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
XHTML 1.0 Frameset :
This Document Type is equal to XHTML 1.0 Transitional, but allows the use of frameset content.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
XHTML 1.1 :
This DTD is equal to XHTML 1.0 Strict, but allows you to add modules, e.g to provide ruby support for East-Asian languages.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
HTML Advanced tutorial 31 : HTML to XHTML >>
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