Automated web service composition with knowledge approach

The topic of this thesis is web service composition with using planning methods and knowledge approach. Web services are programs located on computer networks (mainly on internet). Each web service provides certain functionality (e.g. translation between two languages). If it is not possible fulfill request by one web service (e.g. it’s needed translate word from English to Spanish but there is not available service, which directly translates words between these two languages), web services composition can help here (e.g. there is one web service to translate English word to German, and second service, which translates German word to Spanish). In presented thesis were introduced own approaches for handling this problems, which outgoing from existing methods and system for automated web service composition. These approaches are based on using knowledge representation, either on ontological web service description (OWL-S) and other ontological description, e.g. description of domain (OWL Ontology Web Language). The composition is performed by artificial intelligence planning methods. For planning was choices PDDL language. In this work is introduced methods for transformation ontologies into PDDL planning task. Beside this is there proposed complete web service composition system, which was also partially implemented.