Simple data enconding format, handles scalars, arrays/structures, date and time. [http://www.openwddx.org/] A very complete format specification for chemical data: structural information (coordinates, sequence, etc.) and properties (charges, spectroscopical data, etc.). One of the first XML applications designed. [http://www.xml-cml.org/] Widely used for news syndication (e.g. Slashdot, Freshmeat, PHPBuilder). [http://groups.yahoo.com/group/rss-dev/files/namespace.html]