Leiautes Dinâmicos para Documentos Multimídia Baseados em Templates

Template-based languages can be used for arranging interface components in a layout model, like a grid. Declarative multimedia authoring languages, such as NCL (Nested Context Language), may use those templates for decreasing the authoring effort while specifying a presentation spatial layout. Although layout models are helpful for specifying presentation characteristics for media items, they usually do not consider the case where changes may happen at runtime. Moreover, presentations may lose tidiness when displayed on a device different then the one it was designed for or due to the viewer context or even due to viewer interaction. This thesis proposes STyLe, a template language for dynamic spatial layout. STyLe is a constraint-based template language for providing dynamic and adaptive spatial layouts for hypermedia documents. It also presents a framework capable of interpreting this language and performing the necessary changes in order to dynamically update NCL media object presentation characteristics at runtime.

Extending Hypermedia Conceptual Models to Support Hyperknowledge Specifications

Most multimedia documents available today are agnostic to data semantics. Moreover, their specification language offers little to ease authoring of meaningful content. In this paper, we present the main entities of a new version (3.1) of the Nested Context Model (NCM), which concentrate efforts at integrating support for enriched concept description to the model. These extensions enable the specification of relationships between concept descriptions and multimedia content in the hypermedia way, composing what we call hyperknowledge in this paper. NCM previous version (3.0) is a hypermedia conceptual model. NCL (Nested Context Language), which is part of international standards and ITU recommendations, was engineered according to NCM 3.0 definitions. The extensions discussed in this paper contribute not only for advances in the NCL, but mainly as a conceptual model for hyperknowledge document engineering.