Representation and Reasoning About Changing Semantics in Heterogeneous Data Sources
نویسندگان
چکیده
Changes of semantics in data sources further complicate the semantic heterogeneity problem. We identify four types of semantic heterogeneities related to changing semantics and present a solution based on an extension to the Context Interchange (COIN) framework. Changing semantics is represented as multi-valued contextual attributes in a shared ontology; however, only a single value is valid over a certain time interval. A mediator, implemented in abductive constraint logic programming, processes the semantics by solving temporal constraints for single-valued time intervals and automatically applying conversions to resolve semantic differences over these intervals. We also discuss the scalability of the approach and its applicability to the Semantic Web.
منابع مشابه
Representation and Reasoning about Changing Semantics in Heterogeneous
Changes of semantics in data sources further complicate the semantic heterogeneity problem. We identify four types of semantic heterogeneities related to changing semantics and present a solution based on an extension to the Context Interchange (COIN) framework. Changing semantics is represented as multi-valued contextual attributes in a shared ontology; however, only a single value is valid ov...
متن کاملNonmonotonic Multi-Context Systems: A Flexible Approach for Integrating Heterogeneous Knowledge Sources
MCS provide a flexible, principled account of integrating heterogeneous knowledge sources, a task that is becoming more and more relevant. By a knowledge source we mean a knowledge base (KB) formulated in any of the typical knowledge representation languages, including classical logic, description logics, modal or temporal logics, but also nonmonotonic formalisms like logic programs under answe...
متن کاملSemantic Interoperation Via Intelligent Mediation
in the same representation, and hence their results can be readily merged. To compile the result of query (5) into a set of cargo entities in the ight database, we need a rule: mapping the rst attribute domain to the other attribute domains. These functions are interpretations of the fact that attribute a 1 is the key of entity O. Applying this rule, every pair in the result of query (5) is bou...
متن کاملModeling Social Attitudes on the Web
This paper argues that in order to allow for the representation, comparison and assessment of possibly controversial or uncertain information on the web, the semantic web effort requires capabilities for the social reasoning about web ontologies and other information acquired from multiple heterogeneous sources. As an approach to this, we propose formal means for the representation of possibly ...
متن کاملReactive multi-context systems: Heterogeneous reasoning in dynamic environments
In this paper we introduce reactive multi-context systems (rMCSs), a framework for reactive reasoning in the presence of heterogeneous knowledge sources. In particular, we show how to integrate data streams into multi-context systems (MCSs) and how to model the dynamics of the systems, based on two types of bridge rules. We illustrate how several typical problems arising in the context of strea...
متن کامل