Frames, Objects and Relations: Three Semantic Levels for Knowledge Base Systems
نویسندگان
چکیده
We propose an architecture for large-scale knowledge base systems based on database technologies and the three levels of semantic construct-frames, objects and relations. The intermediate object level retains the structural semantics of the frame level and is therefore beneecial in bridging the semantic gap between the frame and re-lational levels and enabling the use of semantic information in query optimisation. Speciically, we outline how this approach has been adopted in the hybrid knowledge base system, HYWIBAS.
منابع مشابه
مدلسازی روابط توپولوژیک سه بعدی فازی در محیط GIS
Nowadays, geospatial information systems (GIS) are widely used to solve different spatial problems based on various types of fundamental data: spatial, temporal, attribute and topological relations. Topological relations are the most important part of GIS which distinguish it from the other kinds of information technologies. One of the important mechanisms for representing topological relations...
متن کاملPresenting a method for extracting structured domain-dependent information from Farsi Web pages
Extracting structured information about entities from web texts is an important task in web mining, natural language processing, and information extraction. Information extraction is useful in many applications including search engines, question-answering systems, recommender systems, machine translation, etc. An information extraction system aims to identify the entities from the text and extr...
متن کاملOntology-based access control for social network systems
As the information flowing around in social network systems is mainly related or can be attributed to their users, controlling access to such information by individual users becomes a crucial requirement. The intricate semantic relations among data objects, different users, and between data objects and users further add to the complexity of access control needs. In this paper, we propose an acc...
متن کاملA Translation Scheme for Domain Ontologies Based on ModelOntologies
To ensure the re-use of domain ontologies the usual approach relies on a pivot language, e.g., Kif, into and from which the domain ontology is translated. This requires several distinct translators for the diierent target Knowledge Based System (KBS). We propose a solution which uses a unique translator whatever the target KBS, Description Logic, objects or frames. It relies on a Domain Ontolog...
متن کاملA rule - based video database system architecture q
We propose a novel architecture for a video database system incorporating both spatio-temporal and semantic (keyword, event/activity and category-based) query facilities. The originality of our approach stems from the fact that we intend to provide full support for spatio-temporal, relative object-motion and similarity-based objecttrajectory queries by a rule-based system utilizing a knowledge-...
متن کامل