RDDL, the Resource Directory Description Language, is an XML application invented by Jonathan Borden, Tim Bray, and various other members of the xml-dev mailing list to describe XML applications identified by namespace URLs. A RDDL document lives at the namespace URL for the application it describes. RDDL is a hybrid of XHTML Basic and one custom element, rddl:resource . A rddl:resource element is a simple XLink that points to a resource related to the application the RDDL document describes. Humans with browsers can read the XHTML parts to learn about the application. Software can read the rddl:resource elements.
