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Automatic layout based on formal semantics

The department Publication and Visualisation Environment (PaVE) at the Integrated Publication and Information Systems Institute (IPSI) is currently building a publishing environment for electronic reference works. As an example and in order to derive requirements for this publishing environment we are currently building an electronic prototype of the Dictionary of Art. The paper version will be published as a commercial product by Macmillan Publishers Ltd. in 1995. In addition to the extraction of facts from the texts of the Dictionary of Art and the representation of these facts in a network of information units (Object Network), one of the major tasks in building the prototype is the design of its end-user interface. Support will be provided for the end-user to retrieve facts from the object network. In order to provide an intuitive way of displaying and interacting with the query results, we intend to provide a graphical dialogue interface. The display of the query results requires the automatic visualisation of a portion of the object network. Automatic visualisation of query results is an important feature because it reflects the characteristics of individual data sets. We want to use automatic layout in the context of an interactive query-presentation process so that the diagrams not only serve to communicate information to the user, but also to allow him to specify further information requests based on presentation results. In this short paper we describe a knowledge-based automatic visualisation approach. The visualisation principle is to see the layout problem as an organisation process. Data regularities which can be described in terms of formal semantics as well as structural properties are the basic components for the construction of the data organisation. This organisation can be translated into the visual organisation of the final presentation.