IDENTIFICATION OF ONTOLOGIES TO REUSE KNOWLEDGE FOR SUBSTATION FAULT RECOVERY SUPPORT SYSTEM

A methodology to identify task/domain ontologies is proposed in this p aper. According to the methodology, task/domain ontologies that are in dispensable for building a reusable knowledge base are identified. The expertise model of the methodology has two kinds of ontologies at dif ferent abstraction levels. The first one is based on a vocabulary appl icable in common to the entire target field. This vocabulary is used a s a communication basis between domain experts and knowledge engineers , The first layer of an expertise model is described in this vocabular y and is built in collaboration with them. The second one is based on a generic vocabulary. By defining the common vocabulary in terms of th e generic vocabulary, a reusable task model that is an expertise model at the second layer can be built. We evaluate the effectiveness of th is methodology by applying it into substation restoration problems.