WoTDL: Web of Things Description Language for Automatic Composition

Enabling end users to take a proactive role in the development of Web of Things (WoT) applications that achieves their goals is a challenge for End User Development (EUD) in the context of WoT. This can be achieved through Artificial Intelligence (AI) planning algorithms if the relevant WoT concepts and relationships are described in an interoperable way. Although similar, existing service description languages like WSDL or ontologies like OWL-S are not sufficient to represent all required characteristics of concrete WoT planning scenarios. To address these limitations, in this paper we present the Web of Things Description Language (WoTDL) ontology which is an extension of existing WoT models to describe the key concepts of AI planning for automatic WoT composition. To demonstrate the feasibility of our approach, we follow the best practices recommended by the semantic web community and describe the physical devices of our smart home testbed in an AI planning scenario using WoTDL.