OPML (Outline Processor Markup Language) is an XML format for outlines (defined as `a tree, where each node contains a set of named attributes with string values`). Originally developed by UserLand as a native file format for the outliner application in its Radio UserLand product, it has since been adopted for other uses, the most common being t.....
Found on
http://en.wikipedia.org/wiki/OPML
Outline Processor Markup Language
Found on
http://www.translationdirectory.com/glossaries/glossary117.htm
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