Nested context language (NCL) and Ginga-NCL for IPTV services
AAP Summary
This Recommendation gives the specification of the nested context language (NCL) and of an NCL presentation engine called Ginga-NCL to provide interoperability and harmonization among IPTV multimedia application frameworks.
NCL is a glue language that holds media objects together in a multimedia presentation, no matter which object types they are. As an example, NCL treats an HTML document as one of its possible media objects. In this way, NCL does not substitute but embed XHTML-based documents. The same reasoning applies to other multimedia objects. Ginga-NCL is an NCL presentation engine built as a component of an IPTV middleware. A very special NCL object type defined in Ginga-NCL is NCLua, an imperative media-object with Lua code.
This Recommendation contains electronic attachments with the XML schemas for NCL 3.0 Enhanced DTV profile, NCL 3.0 Causal Connector profile, NCL 3.0 modules used in the Enhanced DTV profile and for Command Parameters defined in NCL Live Editing Commands. It also contains three files comprising an example of NCL script (see Appendix II).
Source :
http://www.itu.int/ITU-T/aap/AAPRecDetails.aspx?AAPSeqNo=1894
Documento publicado no site da ITU-T
Muito bom!!!
ResponderExcluir