Relating declarative hypermedia objects and imperative objects through the NCL glue language

This paper focuses on the support provided by NCL (Nested Context Language) to relate objects with imperative code content and declarative hypermedia-objects (objects with declarative code content specifying hypermedia documents). NCL is the declarative language of the Brazilian Terrestrial Digital TV System (SBTVD) supported by its middleware called Ginga. NCL and Ginga are part of ISDB standards and also of ITU-T Recommendations for IPTV services. The main contribution of this paper is the seamless way NCL integrates imperative and declarative language paradigms with no intrusion, maintaining a clear limit between embedded objects, independent of their coding content, and defining a behavior model that avoids side effects from one paradigm use to another. Categories and Subject Descriptors I.7.2 [Document and Text Processing]: Document Preparation languages and systems, markup languages, multi/mixed media, hypertext/hypermedia, standards. D.3.2 [Programming Languages]: Language Clas...

• Type: Journal
• Year: 2009
• Where: DOCENG
• Authors: Luiz Fernando Gomes Soares, Marcelo Ferreira Moreno, Francisco Sant'Anna
• Keywords: Declarative Language, Digital Tv, DOCENG 2009, Document Analysis, Imperative Code Content