Modeling Interactive Web Sources for Information Mediation

We propose a method for modeling complex Web sources that have active user interaction requirements. Here active" refers to the fact that certain information in these sources is only reachable through interactions like lling out forms or clicking on image maps. Typically, the former interaction can be automated by wrapper software e.g., using parameterized urls or post commands while the latter cannot and thus requires explicit user interaction. We propose a modeling technique for such interactive Web sources and the information they export, based on so-called interaction diagrams. The nodes of an interaction diagram model sources and their exported information, whereas edges model transitions and their interactions. The paths of a diagram correspond to sequences of interactions and allow to derive the various query capabilities of the source. Based on these, one can determine which queries are supported by a source and derive query plans with minimal user interaction. This tech...

• Type: Conference
• Year: 1999
• Where: ER
• Authors: Bertram Ludäscher, Amarnath Gupta
• Keywords: Database, ER 1999, Interaction Diagram, User Interaction, Web Sources