scope:

This Recommendation¹ specifies the nested context language (NCL) and an NCL presentation environment, called Ginga-NCL, to provide interoperability and harmonization among IPTV multimedia application frameworks. To provide global standard IPTV services, it is foreseeable that a combination of different standard multimedia application frameworks will be used. Therefore, this Recommendation specifies the nested context language, as one of those standards that compose the multimedia application frameworks, to provide interoperable use of IPTV services. Ginga-NCL is an NCL presentation environment that integrates NCL and Lua players. NCL and Lua frameworks can be used in other declarative environments, but if they are used together they shall follow the Ginga-NCL specification.

¹ This Recommendation includes an electronic attachment containing NCL 3.1 module schemas used in the enhanced DTV profile.