Combining the DTDs of XML Languages 2.6 2001/06/29 2002/07/17 Sarah Coppin coppin@alumni.rice.edu Bill Wilson wlw@rice.edu Sarah Coppin coppin@alumni.rice.edu Christine Donica mizar@alumni.rice.edu Jenn A. Drummond jenn@rice.edu Brent Michael Hendricks brentmh@rice.edu DTD XML Explains how to include more than one XML language within the same document. Multiple XML languages can be combined in the same document. However, in order for these documents to be valid, they must have a Document Type Definition (DTD) that allows tags from one language to exist inside tags from another language. So if you wanted to include MathML in a CNXML document, you would need a DTD that allowed MathML to exist inside certain CNXML tags. Once that DTD existed, you would declare the DOCTYPE the same as normal. To actually use both languages you would need to use namespaces. For just CNXML, the doctype declaration is: ]]> For CNXML and MathML, the doctype declaration is: ]]> For CNXML and QML, the doctype declaration is: ]]> For CNXML, QML, and MathML, the doctype declaration is: ]]>