Example of XML DTD

XML (Extensible Markup Language) DTD (Document Type Definition) is a set of elements or commands that format, structure, and organize an XML file.

Example of XML Code
Example of XML Data
Example of XML Sitemap
Example of XML Schema

Examples of XML DTD:

https://en.wikipedia.org/wiki/Document_Type_Definition#XML_DTD_Example
https://www.utas.edu.au/servicedesk/helpsheet/xml-basic.html
https://www.csci.csusb.edu/dick/samples/xml.html
https://www.ils.unc.edu/~kempa/inls259/xml/
https://www.cs.rpi.edu/~puninj/XMLJ/classes/class3/slide11-0.html