Results 1 - 10 of 2,105

Towards a Standard Upper Ontology

by Ian Niles, Adam Pease , 2001
"... The Suggested Upper Merged Ontology (SUMO) is an upper level ontology that has been proposed as a starter document for The Standard Upper Ontology Working Group, an IEEE-sanctioned working group of collaborators from the fields of engineering, philosophy, and information science. The SUMO provides d ..."
Abstract - Cited by 589 (22 self) - Add to MetaCart
definitions for general-purpose terms and acts as a foundation for more specific domain ontologies. In this paper we outline the strategy used to create the current version of the SUMO, discuss some of the challenges that we faced in constructing the ontology, and describe in detail its most general concepts

A translation approach to portable ontology specifications

by Thomas R. Gruber - KNOWLEDGE ACQUISITION , 1993
"... To support the sharing and reuse of formally represented knowledge among AI systems, it is useful to define the common vocabulary in which shared knowledge is represented. A specification of a representational vocabulary for a shared domain of discourse — definitions of classes, relations, functions ..."
Abstract - Cited by 3365 (9 self) - Add to MetaCart
, functions, and other objects — is called an ontology. This paper describes a mechanism for defining ontologies that are portable over representation systems. Definitions written in a standard format for predicate calculus are translated by a system called Ontolingua into specialized representations

Ontologies and knowledge bases: Towards a terminological clarification

by Nicola Guarino, Pierdaniele Giaretta - Towards very Large Knowledge bases: Knowledge Building and Knowledge sharing , 1995
"... The word “ontology ” has recently gained a good popularity within the knowledge engineering community. However, its meaning tends to remain a bit vague, as the term is used in very different ways. Limiting our attention to the various proposals made in the current debate in AI, we isolate a number o ..."
Abstract - Cited by 310 (13 self) - Add to MetaCart
given purpose. A crucial point in this clarification effort is the careful analysis of Gruber’ s definition of an ontology as a specification of a conceptualization. 1

Bootstrapping ontology alignment methods with apfel

by Marc Ehrig, Steffen Staab, York Sure - In ISWC , 2005
"... Abstract. Ontology alignment is a prerequisite in order to allow for interoperation between different ontologies and many alignment strategies have been proposed to facilitate the alignment task by (semi-)automatic means. Due to the complexity of the alignment task, manually defined methods for (sem ..."
Abstract - Cited by 103 (1 self) - Add to MetaCart
. The methods are based on extensional and intensional ontology definitions. Core to APFEL is the idea of a generic alignment process, the steps of which may be represented explicitly. APFEL then generates new hypotheses for what might be useful features and similarity assessments and weights them by machine

OBSERVER: An Approach for Query Processing in Global Information Systems based on Interoperation across Pre-existing Ontologies

by E. Mena, V. Kashyap, A. Sheth, A. Illarramendi , 1996
"... The huge number of autonomousand heterogeneous data repositories accessible on the “global information infrastructure” makes it impossible for users to be aware of the locations, structure/organization, query languages and semantics of the data in various repositories. There is a critical need to co ..."
Abstract - Cited by 295 (36 self) - Add to MetaCart
. We discuss a scalable approach for vocabulary sharing. The objects in the repositories are represented as intensional descriptions by pre-existing ontologies expressed in Description Logics characterizing information in different domains. User queries are rewritten by using interontologyrelationships

The even more irresistible SROIQ

by Ian Horrocks, Oliver Kutz, Ulrike Sattler - In KR , 2006
"... We describe an extension of the description logic underlying OWL-DL, SHOIN, with a number of expressive means that we believe will make it more useful in practise. Roughly speaking, we extend SHOIN with all expressive means that were suggested to us by ontology developers as useful additions to OWL- ..."
Abstract - Cited by 342 (50 self) - Add to MetaCart
We describe an extension of the description logic underlying OWL-DL, SHOIN, with a number of expressive means that we believe will make it more useful in practise. Roughly speaking, we extend SHOIN with all expressive means that were suggested to us by ontology developers as useful additions to OWL

Towards a Methodology for Building Ontologies

by Mike Uschold, Martin King - In Workshop on Basic Ontological Issues in Knowledge Sharing, held in conjunction with IJCAI-95 , 1995
"... We outline some requirements for a comprehensive methodology for building ontologies, and review some important work that has been done in the area which could contribute to this goal. We describe our own experiences in constructing a significant ontology, emphasising the ontology capture phase. We ..."
Abstract - Cited by 244 (4 self) - Add to MetaCart
first consider the very general issue of categorisation in modelling, and relate it to the process of ontology capture. We then describe the procedure that we used to identify the terms and produce definitions. We describe a successful way to handle ambiguous terms, which can be an enormous obstacle

Ontolingua: A Mechanism to Support Portable Ontologies

by Thomas R. Gruber , 1992
"... An ontology is a set of definitions of content-specific knowledge representation primitives: classes, relations, functions, and object constants. Ontolingua is mechanism for writing ontologies in a canonical format, such that they can be easily translated into a variety of representation and reasoni ..."
Abstract - Cited by 245 (5 self) - Add to MetaCart
An ontology is a set of definitions of content-specific knowledge representation primitives: classes, relations, functions, and object constants. Ontolingua is mechanism for writing ontologies in a canonical format, such that they can be easily translated into a variety of representation

The Enterprise Ontology

by Mike Uschold, Mike Uschold, Martin King, Martin King, South Bridge Rosanne House, Stuart Moralee, Stuart Moralee, Yannis Zorgios, Yannis Zorgios - The Knowledge Engineering Review , 1995
"... This is a comprehensive description of the Enterprise Ontology, a collection of terms and definitions relevant to business enterprises. We state its intended purposes, describe how we went about building it, define all the terms and describe our experiences in converting these into formal definit ..."
Abstract - Cited by 158 (1 self) - Add to MetaCart
This is a comprehensive description of the Enterprise Ontology, a collection of terms and definitions relevant to business enterprises. We state its intended purposes, describe how we went about building it, define all the terms and describe our experiences in converting these into formal

Modeling Associations through Intensional Attributes

by Andrea Presa, Yannis Velegrakis, Flavio Rizzolo, Siarhei Bykau
"... Abstract. Attributes, a.k.a. slots or properties, are the main mechanism used to define associations between concepts or individuals modeling real world entities in a knowledge base. Traditionally, an attribute is defined by an explicit statement that specifies the name of the attribute and the enti ..."
Abstract - Cited by 3 (3 self) - Add to MetaCart
and the entities it associates. This has three main limitations: (i) it is not easy to apply to large amounts of data, even if they share the same characteristics, since explicit definitions are needed for each concept or individual; (ii) it cannot handle future data, i.e., when new concepts or individuals
Results 1 - 10 of 2,105