DTDs and Namespaces

Namespaces in XML are designated by URIs, which in practice are web addresses under the control of the organization supporting the dialect of XML. The following two examples are the namespace designations for XSLT and MathML, both recommendations of the W3C.

www.w3.org/1999/XSL/Transform

www.w3.org/1998/Math/MathML

The namespace for NotebookML and ExpressionML, is specified by the following URI.

www.wolfram.com/XML

The DTD for NotebookML and ExpressionML is located at the following URI.

www.wolfram.com/XML/DTD/notebookml1.dtd