Linguagens computacionais como interfaces: um estudo com nested context language

ABSTRACT

This paper presents an empirical study about the Nested Context Language (NCL), which is a language developed to create multimedia documents and Interactive Digital TV (IDTV) applications for the Brazilian system. The goal was to obtain indicators of NCL usability in the generation of content for IDTV, since this language plays the role of interface language for users. Through data collected on forms filled by 220 students from various classes of training courses conducted in some states of Brazil and later analysis by a mix of qualitative and quantitative methods, some aspects were found where the NCL profile can and should be improved in order to ease the activities of content creators for IDTV, who have a heterogeneous profile and are not necessarily familiar with computer programming.

REFERENCES

• 1: Antonacci M. J., Muchaluat-Saade D. C., Rodrigues R. F., Soares L. F. G. NCL: Uma Linguagem Declarativa para Especificação de Documentos Hipermídia na Web, VI Simpósio Brasileiro de Sistemas Multimídia e Hipermídia -SBMídia2000, Natal, Rio Grande do Norte, Junho de 2000.
• 2: ETSI -- European Telecommunications Standards Institute. Digital Video Broadcasting (DVB); Multimedia Home Platform (MHP) Specification 1.1.1, Especificação Técnica ETSI TS 102 B12, Maio de 2005.
• 3: ARIB -- Association of Radio Industries and Businesses. Data Coding and Transmission Specifications for Digital Broadcasting Volume 2: XML-Based Multimedia Coding Schema, STD-B24 Versão 4, Fevereiro de 2004.
• 4: Soares, L. F. G.; Rodrigues, R. F. Nested Context Model 3.0 -- Part 1: NCM Core, Monografias em Ciência da Computação, Departamento de Informática da Pontifícia Universidade Católica do Rio de Janeiro, 2005.
• 5: W3C - World-Wide Web Consortium (2002). XHTML#8482; 1.0 The Extensible HyperText Markup Language (Second Edition). W3C Recommendation, Agosto de 2002.
• 6: W3C - World-Wide Web Consortium. Extensible Markup Language (XML) 1.1, fevereiro de 2004. Disponível em http://www.w3.org/TR/2004/RECxml11-20040204/. Acesso em 05 nov. 04.
• 7: Barbosa, Simone et al; Construindo Programas Audiovisuais Interativos Utilizando a NCL 3.0 e a Ferramenta Composer. Relatório Técnico, 2007.
• 8: John W. Cresswell (2003): Research Design - Qualitative, Quantitative, and Mixed Methods Approaches, Second Edition. Thousand Oaks: Sage.
• 9: G. Fischer , E. Giaccardi , Y. Ye , A. G. Sutcliffe , N. Mehandjiev, Meta-design: a manifesto for end-user development, Communications of the ACM, v.47 n.9, September 2004 [doi>10.1145/1015864.1015884]
• 10: The Programming Language Lua. http://www.lua.org/.
• 11: Coelho, R. M.; Rodrigues, R. F.; Soares, L. F. G (2004). Integração de Ferramentas Gráficas e Declarativas na Autoria de Arquiteturas Modeladas através de Grafos Compostos. X Simpósio Brasileiro de Sistemas Multimídia e WEB - WebMídia 2004, Ribeirão Preto, Brasil - Outubro de 2004.
• 12: Lieberman, H.; Parternò, F.; Klann, M.; Wulf, V. (2006) End-user development: An emerging paradigm. In End-User Development (Lieberman, Paternò and Wulf, Eds.). Springer. p. 1.GRAHAM, I. A pattern language for web usability. Addison-Wesley, 2003.

INDEX TERMS

Primary Classification:
  H. Information Systems
  H.5 INFORMATION INTERFACES AND PRESENTATION (I.7)
      H.5.1 Multimedia Information Systems

Keywords:
end-user programming, interactive digital TV applications, middleware Ginga, nested context language, user studies