This volume contains papers selected for presentation at the 7th Asia Pacific Conference on Web Technology (APWeb 2005), which was held in Shanghai, China during March 29-April 1, 2005. APWeb is an international conference series on WWW technologies and is the primary forum for researchers and practitioners from both academia and industry to exchange knowledge on WWW-related technologies and new advanced applications. APWeb 2005 received 420 submissions from 21 countries and regions worldwide, including China, Korea, Australia, Japan, Taiwan, France, UK, Canada, USA, India, Hong Kong, Brazil, Germany, Thailand, Singapore, Turkey, Spain, Greece, Belgium, New Zealand, and UAE. After a thorough review process for each submission by the Program Committee members and expert reviewers recommended by PC members, APWeb 2005 accepted 71 regular research papers (acceptance ratio 16.9%) and 22 short papers (acceptance ratio 5.2%). This volume also includes 6 keynote papers and 11 invited demo papers. The keynote lectures were given by six leading experts: Prof. Ah Chung Tsoi (Australia Research Council), Prof. Zhiyong Liu (National Nature Science Foundation of China), Prof. John Mylopoulos (University of Toronto), Prof. Ramamohanarao (Rao) Kotagiri (University of Melbourne), Prof. Calton Pu (Georgia Tech), and Prof. Zhiwei Xu (Chinese Academy of Sciences).

Keynote Papers.- Session 1: Classification and Clustering.- Session 2: Topic and Concept Discovery.- Session 3: Text Search and Document Generation.- Session 4: Web Search.- Session 5: Mobile and P2P.- Session 6: XML (1).- Session 7: XML (2).- Session 8: Integration and Collaboration.- Session 9: Data Mining and Analysis.- Session 10: Web Browsing and Navigation.- Session 11: Spatial Data.- Session 12: Stream Data Processing.- Session 13: Web Service.- Session 14: Ontology.- Session 15: Change Management.- Session 16: Personalization.- Session 17: Performance and Optimization.- Session 18: Web Caching.- Session 19: Data Grid.- Session 20: Multimedia.- Session 21: Object Recognition and Information Extraction.- Session 22: Visualization and User Interfaces.- Session 23: Delivery and Network.- Session 24: Invited Demo Papers.