Introduction Editor's Indtroduction i Feature Articles A Model for Web Services Discovery with QoS Shuping Ran 1 Specifying Conflict of Interest Assertions in WS-Policy with Chinese Wall Security Policy Patrick C. K. Hung and Guang-Sha Qiu 11 Context Representation of Product Data Jingzhi Guo and Chengzheng Sun 20 Exploring the Factors Affecting Internet Content Filters Acceptance Shuk Ying Ho and Siu Man Lui 29 ISSN 1551-9031