Namespace URIs

• Each prefix in a qualified name is associated with a URI.

• For example, all elements in XSLT 1.0 style sheets are associated with the http://www.w3.org/1999/XSL/Transform URI.

• The customary prefix xsl is a shorthand for the longer URI http://www.w3.org/1999/XSL/Transform.

• You can't use the URI in the element name directly.

  {http://www.w3.org/1999/XSL/Transform}template

  http://www.w3.org/1999/XSL/Transform#template