scope:

This Recommendation is intended to harmonize the application environment for declarative content for interactive TV. It specifies common elements, media types and APIs at the syntactic level of the declarative application environment to satisfy regional application requirements for the three standards ACAP-X, BML and DVB-HTML as specified in the normative references below. This Recommendation is divided into five annexes. Annex A describes the common core of the three standards. Annex B describes additional functionality outside the common core for BML. Annex C describes additional functionality outside the common core for ACAP-X. Annex D describes additional functionality outside the common core for DVB-HTML. The format described in Annex E is intended as the intermediate format for translation between formats including the common core and the standards covered in this Recommendation.

It is noted that there are other formats such as ETSI MHEG-5 (and the version in preparation specifying extended interactive services), which contain declarative functions are not covered in this Recommendation. However, the migration from environments in current use to the harmonized environment is assisted by the identification of a common core and the translation using the intermediate format.