We describe the approach AIDAS uses to extract the logical document structure from PDF documents. The approach is based on the idea that the layout structure contains cues about the logical structure and that the logical structure can be discovered incrementally.
In this paper we investigate the application of data mining methods to provide learners with real-time adaptive feedback on the nature and patterns of their on-line communication while learning collaboratively. We derived two models for classifying chat messages using data mining techniques and tested these on an actual data set . The reliability of the… (More)
In this paper we investigate how retrieving information can be improved through task related indexing of documents based on ontologies. Different index types, varying from contentbased keywords to structured taskbased indexing ontologies are compared in an experiment that simulates the task of creating instructional material from a database of source… (More)
It is next to impossible to develop real-life applications in just pure Prolog. With XPCE  we realised a mechanism for integrating Prolog with an external object-oriented system that turns this OO system into a natural extension to Prolog. We describe the design and how it can be applied to other external OO systems.
Often research on online communities could be compared to archaeology : researchers look at patterns in digital traces that members leave to characterise the community they belong to. Relatively easy access to these traces and a growing number of methods and tools to collect and analyse them make such analysis increasingly attractive. However, a… (More)
The separation between user interface and functionality found in many screen editors is generalized to handle a data model based on frames and binary relations. This paper describes a User Interface Management System (UIMS) based on the data model. The UIMS is capable of maintaining different and simultaneous representations of the same application data… (More)