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Qu, Changtao; Nejdl, Wolfgang – Educational Technology & Society, 2004
Edutella is an RDF-based E-Learning P2P network that is aimed to accommodate heterogeneous learning resource metadata repositories in a P2P manner and further facilitate the exchange of metadata between these repositories based on RDF. Whereas Edutella provides RDF metadata repositories with a quite natural integration approach, XML metadata…
Descriptors: Metadata, Educational Resources, Models, Programming

Yannakoudakis, E. J.; Tsionos, C. X.; Kapetis, C. A. – Journal of Documentation, 1999
Describes research aimed at investigating dynamically evolving database environments and corresponding schemata that allow storage and manipulation of variable length data, a variable number of fields per record, variable length records and fields, and dynamically defined objects. Proposes a new framework for dynamic database environments.…
Descriptors: Change, Computer System Design, Data Processing, Database Design

Moffat, Alistair; And Others – Information Processing & Management, 1994
Describes an approximate document ranking process that uses a compact array of in-memory, low-precision approximations for document length. Combined with another rule for reducing the memory required by partial similarity accumulators, the approximation heuristic allows the ranking of large document collections using less than one byte of memory…
Descriptors: Database Design, Database Management Systems, Full Text Databases, Information Retrieval