In 2003, Robin Cover, Managing Editor of "The Cover Pages," a website devoted to XML and SGML references and articles, compiled the following list of XML vocabularies ...

OPML an XML-based format that allows exchange of outline-structured information between applications running on different operating systems and environments. This term was viewed 3,820 times.

A set of labels that are embedded within text to distinguish individual elements or groups of elements for display or identification purposes. The labels are typically known as "tags." For rendering ...