Extracting a Sub-Ontology from Multiple RDFS Onotologies
Pla Uni · 2007
RDFS ontology provides a frame for representing semantic information.It is the core of Semantic Web.The efficiency of domain-specific knowledge application decreases with the size of ontology increasing.Extracting a domain sub-ontology from source ontologies may solve this problem.Knowledge of single ontology may be not sufficient and more domain knowledge can be obtained by extracting a sub-ontology from multiple source ontologies than from single one.RDFS ontologies are abstracted as graph models.According to the RDFS inference roles and the mapping among multiple ontologies,the closure of multiple RDFS source ontologies can be constructed.We also present an algorithm based on the graph theory to extract a sub-graph with domain concepts as nodes.This sub-graph is regarded as the required domain ontology.The method is applicable to RDFS domain ontology extraction.Applying the method,a domain ontology can be built fast and effectively.