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Showing 1 to 9 of 9 for “"query answering"”.
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Query Answering over Contextualized RDF/OWL Knowledge with Expressive Bridge Rules: Decidable classes
… thesis, we study the problem of reasoning and query answering over contextualized knowledge in quad format augmented with expressive forall-existential bridge rules. Such bridge rules contain conjunctions, existentially quantified variables in the head, and are strictly more expressive than the …
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Managing Large Multidimensional Datasets Inside a Database System
… support applications, we develop an approximate query processing technique based on multidimensional wavelets. Our technique constructs compact synopses (comprising of wavelet coefficients) of the relevant database tables and subsequently answers any SQL query by working exclusively on the …
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Scalable Reasoning for Knowledge Bases Subject to Changes
… between an evolving knowledge base and a query manager with support of "trust" yields an architecture that can support reasoning in the face of frequent changes. An optimized query-answering algorithm, an optimized backward chaining algorithm and a trust-based hybrid reasoning algorithm …
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Practical Rewriting Techniques for Warded Ontology-Mediated Queries
… main tasks in this context is Ontology-Mediated Query (OMQ) Answering. That is, given an Ontology-Mediated Query O = (q, Σ), comprising a TGD-based ontology Σ and a query q (usually a conjunctive query), find all the answers to q that can be entailed from the logical theory D ∧ Σ, where D is …
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A Semi-Supervised Information Extraction Framework for Large Redundant Corpora
… models of the data the user wishes to query which generally avoid the lim- itations and complexity of most Information Extractions systems. The framework uses a semi-supervised approach to minimize human input. It also eliminates the need for external Named Entity Recognition systems by …
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Automated Reasoning via a Multi-sorted Fragment of Computable Set Theory with Applications to Semantic Web
… data enables software agents to manipulate and query information on behalf of human agents. To achieve such goal, machines are provided with appropriate languages and tools. Investigating new technologies which can extend the power of knowledge representation and reasoning systems is the main …
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Top-k Semantic Caching
… are practical use cases. A semantic cache is a query-based cache that caches query results and maintains their semantic description. It reuses partial matches of previous query results. Each query that is processed by the semantic cache is split into two disjoint parts: one that can be …