Relates to DRM implementation. Sets the value of the KEYFORMAT attribute. Must be 'identity' or a reverse DNS string. May be omitted to indicate an implicit value of 'identity'.
Relates to DRM implementation. Either a single positive integer version value or a slash delimited list of version values (1/2/3).
Relates to DRM implementation. Use a 32-character hexidecimal string to specify Key Value.
Relates to DRM implementation. The location of the license server used for protecting content.