» Project Info » Workpackages » WP-II » Architecture

The Information Service within the AstroGrid-D architecture

This figure depicts the usage of the Information Service, Stellaris, within AstroGrid-D. Stellaris implements a management interaface for RDF-based metadata and a SPARQL-query interface. information model. The picture shows four different components:

• Information Service Storage (Storage instance), interface for management and query of RDF-based metadata. Multiple instance of Stellaris is deployed over AstroGrid-D to handle different type of metadata or metadata at different institutes. A storage instance can take the role as both RDF information producer and/or consumer.
  
• RDF Information Producer, uses an instance of Stellaris to store and manage RDF-based metadata.
• Information Producer, generates metadata in other formats than RDF, for example XML. A translation mechanism is used to map the metadata into RDF.
• RDF Consumer, extracts metadata using the query or retrieval interface from a Stellaris instance.