In this paper, we propose a new approach called Ontological Hierarchical Task Network based on HTN Planning and Web Service Modelling Ontology for forming collaborative business processes for the cross-enterprise collaboration. | JOURNAL OF SCIENCE, Hue University, Vol. 69, No. 6, 2011 AN ONTOLOGICAL APPROACH TO CROSS-ENTERPRISE COLLABORATION Hoang Huu Hanh1 and Hoang Minh Vu2 1 2 Hue University VNPT Thua Thien Hue Abstract. Cross-enterprise collaboration is one of the challenges on the business-tobusiness integration (B2Bi) research nowadays. With the support of Semantic Web technologies, the gap between business and IT communities has been reduced in order to tackle the mentioned challenge. Semantic Web-based approaches for BPM have been a promising solution taking advantages of Semantic Web technologies such as ontologies, semantic web services. In this paper, we propose a new approach called Ontological Hierarchical Task Network based on HTN Planning and Web Service Modelling Ontology for forming collaborative business processes for the cross-enterprise collaboration. Keywords: Business Process Management, Semantic BPM, B2B integration, Crossenterprise collaboration, Ontology, Semantic Web, Web services. 1 Introduction Cross-enterprise collaboration or so-called business-to-business integration (B2Bi) in some contexts is one of the priority strategies of the e-business research to improve enterprise excellences [2]. It requires exchange and share in business processes between business partners such as customers, suppliers, distributors. One of the most important challenges in integrating or collaborating between companies in the e-business environment is how to collaborate business processes automatically, accurately, flexibly and effectively. The success of the integration between businesses requires the forming and managing of collaborative business processes to achieve business goals. Therefore, scientists and the business managers are especially interested in Business Process Management (BPM). Semantic business process management (SBPM) emerges as a promising solution to the gap between businesses and information technology field with the approach to perform business actions