SMPTE RP 210.4 : 2002

Specifies a registry of metadata element descriptions for association with essence or other metadata. A full explanation is contained in SMPTE 335M. The metadata dictionary structure defined in SMPTE 335M covers the use of metadata for all types of essence (video, audio, and data in their various forms). The standard specifies that any application must conform both to: (a) the definitions and formats in SMPTE 335M; and (b) this metadata dictionary contents practice.