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This paper discusses an approach to the problem of annotating multimedia content. Our approach provides annotation as metadata for indexing, retrieval and semantic processing as well as content enrichment. We use an underlying model for structured multimedia descriptions and annotations, allowing the establishment of spatial, temporal and linking relationships. We discuss aspects related with documents and annotations used to guide the design of an application that allows annotations to be made with pen-based interaction with Tablet PCs. As a result, a video stream can be annotated at the same time that it is captured. Moreover, the annotation can be edited, extended or played back synchronously afterwards.

wVIEW is an automated system for generating Web applications that relies extensively on document representations and transformations. wVIEW adopts the widely accepted hypermedia design principle that content, navigation, and presentation are separate concerns. Each of these aspects of the design process is controlled by separate declarative specifications. Only the first specification, the content structure specification, which is described using UML, must be provided. However, the wVIEW user is free to add extensions and customizations to both the data and navigation models, in order to make the final application suit specific needs. This paper describes the wVIEW approach and the current prototype which focuses on the data and navigation modelling aspects. The paper discusses experiences in using XSLT as the primary development tool and shows examples how the enhancements planned to XSLT address some limitations of the application generation process.

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