This study with the devloping of an ontology to represent performance measurements, and knowledge based search tool to semantically interpret the performance measurement studies in the health care domain. In this research, Dr. Beyan employed the Protege ontology editor and knowledge-base framework. She applied Web Ontology Language (OWL) and Semantic Web Rule Language (SWRL) for formalization of the ontology and knowledge representation. She implemented Description Logics languages for reasoning and used Jess rule engine in her research.