XHTML namespace - World Wide Web Consortium (W3C)
Sep 7, 2016 · The namespace name http://www.w3.org/1999/xhtml is intended for use in various specifications such as: Recommendations:
XHTML - Wikipedia
The namespace URI for XHTML is http://www.w3.org/1999/xhtml. The example tag below additionally features an xml:lang attribute to identify the document with a natural language:
What does "<html xmlns="http://www.w3.org/1999/xhtml">" do?
@hey: So let me get this straight: If your first two lines are <html xmlns="http://www.w3.org/1999/xhtml"> <!DOCTYPE html> - then everything works fine. But if your first two lines are <!DOCTYPE html> …
HTML Versus XHTML - W3Schools
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> …
Namespace "http://www.w3.org/1999/xhtml" | XML Schema ...
ddi-xhtml11-model-1.xsd, ddi-xhtml11-modules-1.xsd, ddi-xhtml11.xsd, xhtml-attribs-1.xsd, xhtml-bdo-1.xsd, xhtml-blkphras-1.xsd, xhtml-blkpres-1.xsd, xhtml-blkstruct ...
Why <html xmlns="http://www.w3.org/1999/xhtml"> is …
Therefore, it is recommended that xmlns="http://www.w3.org/1999/xhtml" should always be included on the <html> tag, since it is the parser that determines how to interpret a document.
XHTML Reference: html
...The head, body, etc. goes here... </html> Attributes Basic xmlns This attribute is required and the value should be http://www.w3.org/1999/xhtml. Advanced version (Text) This attribute has been …