Supplying integrated data model with multiple structures for addressing diverse requirements from different production lifecycles and control levels is the natural development of automation systems. Data processing, presentation and manipulation require well-designed computation model that consists of interrelated groups of function components or applications that can be realized in the form of web services. Binding the available web services to the designed data model becomes a challenging task if a great amount of web services is confronted. In this paper we will use ontology technology to address the binding problem. We will present the required ontology model including the formal expression of ontology, object model, mapping to XML representation and the corresponding system architecture for binding web services.