eBooks - Education - Languages - Alex B?chner - Context Mediation among Knowledge Discovery Components
Context Mediation among Knowledge Discovery Components eBook
by Alex B?chner
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Windows Vista / XP / 2000, Mac OS X, Sony Reader Features
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Context Mediation among Knowledge Discovery Components Summary
| Context Mediation is a field of research that is concerned with the interchange of information across different environments, which provides a vehicle to bridge semantic gaps among disparate entities. Knowledge Discovery is concerned with the extraction of actionable information from large databases. A challenge that has received relatively little attention is knowledge discovery in a highly disparate environment, that is multiple heterogeneous data sources, multiple domain knowledge sources and multiple knowledge patterns. This thesis tackles the problem of semantic interoperability among data, domain knowledge and knowledge patterns in a knowledge discovery process using context mediation. Context fundamentals are introduced, which encompasses the concepts of context identity, semantic values, contextual equivalence, contextual orders, contextual distances, inheritance of contexts and inter-ontology relationships. Based on this foundation, the principles of context mediators for data, domain knowledge and knowledge patterns are outlined, a context mediator prototype is developed and performance tests are carried out. Expanding on these rudimentary elements, context mediation is introduced for data, domain knowledge and knowledge patterns. Contextual data mediation is concerned about semantic conflicts among heterogeneous data sources which are used as input for knowledge discovery. In order to treat contexts as first class citizens and allow inheritance as well as overloading and overriding operations, an object data model has been chosen, namely ODMG. In addition to extending the ODMG meta model, its object definition language and object query counterpart have been extended appropriately. Contextual domain knowledge mediation deals with the integration of pre-existing knowledge about data, preferences and biases ubiquitous in multiple contexts, which are incorporated in the knowledge discovery process. Different types of contextual domain knowledge are fo... |
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eBooks - Titles - Authors - Education - Languages - Alex B?chner - Context Mediation among Knowledge Discovery Components