We present the architecture and a performance assessment of an extensible query optimizer written in Venus. Venus is a general-purpose active-database rule language embedded in C+...
The growing need of software infrastructure able to create, maintain and ease the evolution of scientific data, promotes the development of digital libraries in order to provide th...
: Traceability is a prerequisite for developing high quality (software) systems. Recording and maintaining all available information is too labor intensive and thus by far too expe...
The New Zealand Digital Library offers several collections of information over the World Wide Web. Although fulltext indexing is the primary access mechanism, musical collections ...
Current geographic information systems (GISs) have been designed for querying and maintaining static databases representing static phenomena and give little support to those users ...