572 search results - page 33 / 115 » An Ontology of Meta-Level Categories |
KDD
2006
ACM
15 years 10 months ago
2006
ACM
Ontologies represent data relationships as hierarchies of possibly overlapping classes. Ontologies are closely related to clustering hierarchies, and in this article we explore th...
SACMAT
2009
ACM
15 years 4 months ago
2009
ACM
XACML does not natively support RBAC and even the specialized XACML profiles are not able to support many relevant constraints such as static and dynamic separation of duty. Exte...
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JCDL
2006
ACM
15 years 3 months ago
2006
ACM
Document clustering has been used for better document retrieval, document browsing, and text mining in digital library. In this paper, we perform a comprehensive comparison study ...
WIDM
2005
ACM
15 years 3 months ago
2005
ACM
This paper describes a framework for ontology-based flexible discovery of Semantic Web services. The proposed approach relies on user-supplied, context-specific mappings from an...
GIS
2002
ACM
14 years 9 months ago
2002
ACM
The focus of this paper is on interoperability issues to achieve data integration in distributed databases for geographic applications. Our concrete application is in the context ...