References
- Alexander , J H and Josef , F H . 2003 . UMTS and mobile computing[M]. Wu Yong , Chen Xihao, Translated. Beijing : Publishing House of Electronics Industry (in Chinese) .
- Autere , S , Kalm , J Lehtinen , K . 2001 . Technologies for adaptive mobile service development: use cases and technology survey[OL]. http://www.eurescom.de/
- Roth , J . 2003 . Flexible positioning for location-based services[OL]. http://dreamteam.fernuni-agen.de/paper/
- Ibach , P and Horbank , M . 2004 . Highly available location-based services in mobile environments[C]. International Service Availability Symposium, Munich, Germany
- Location Interoperability Forum . 2001 . Mobile location protocol specification[OL]. http://www.loca-tionforum.org/
- World Wide Web Consortium . 2004 . OWL web ontology language reference[OL]. http://www.w3c.org
- Wei , Song and Ming , Zhang . 2004 . A first step towards the semantic web[M]. Beijing : Publishing House of Higher Education (in Chinese) .