The <html> tag is the tag for the top element of an HTML document. The parent of the <html> tag is the root node of the DOM.
attribute
The attribute
common attributes
In addition to the attributes above, which are specific to the <html> tag, any of the common HTML attributes can also be used.
The <html> element typically contains the following tags:
This is how the <html> tag should appear:
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Example Only</title> ... </head> <body> ... </body></html>
The <html> tag should always include an xmlns attribute, which specifies the namespace of the HTML elements in the document. See the Differences below for more details.
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In the 2000 W3C standard version of HTML (and HTML version 5) the <html> tag includes an xmlns attribute, which specifies the namespace of the HTML elements in the document. Here is how the <html> tag should appear:
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"> ...</html>
In addition to being required by the 2000 W3C standard, specifying the namespace for the elements in the document using the xmlns attribute allows the documents, or a subset of nodes in the document, to be aggregated with other content. If the namespace for the elements is not specified, a reader of a combined documents created by an aggregator will be unable to distinguish the elements in one namespace from those in another. This is the biggest limitation of RSS 0.92 version 2.0 although RSS version 1.0 does use namespaces to solve the problem.
The following attributes should not be coded on the <html> tag because they either have been deprecated or were never officially supported: