NBN EN 15744:2009

This European Standard contains a comprehensive set of metadata elements for representing information about cinematographic works, their variants and manifestations. Detailed information on available media items, viewing requirements, and access conditions is not covered by this standard. However, elementary information concerning the availability of media items can be expressed.
This European Standard also provides some extension points for adding more detailed data types without violating conformance. The guiding principle here is that no information from existing filmographic records should be lost when these are expressed according to this standard. Finally, an XML schema is provided as an aid to data interchange and as a tool for verifying the syntactic conformance of implementations.