1Yu W, Kuber R, Murphy E,et at. A novel multimodal interface for improving visually impaired people' s web accessibility[J]. Virtual Reality, 2006 9 (2/3): 133-148.
2Pownell D Bailey G D. Getting a handle on handhelds[J]. American School Board Journal, 2001 , 188 (6) : 18-21.
3The Transformational Government Technology Policy team e- Government Interoperability Framework Version 6.1[S/OL]. [2008- 06-23]. http ://www. e-envoy, gov uk/publications/frameworks/ egif4/egif4, htm.
4Delivery And Transformation Group. Guidelines for UK Government websites: Framework for local government[S/OL]. [2008-06-23]. http://www, e-envoy, gov. uk/webguidel ines. htm.
5W3C Web Accessibility Initiative. Summary of User Agent Accessibility Guidelines 1.0[S/OL]. [2008 06-23]. http://www.w3 org/WAI/UA/WD-UAAG10-20020708/.
6Delivery And Transformation Group. Guidelines for UK government websites: Illustrated handbook for web management teams[S/OL]. [2008-06-23]. http ://www. e-envoy, gov. uk/webguidelines, htm.
7The Transformational Government Technology Policy team. e- Government Metadata Standard Version 3.1[S/OL]. [2008-06-23]. http://www, govtalk, gov. uk/searchresult2, asp?docnum=473.
8The Transformational Government Technology Policy team. The Government Data Standards Catalogue[S/Q]. [2008-06-23]. http:/ /www. govtalk, gov. uk/schemasstandards/datastandards, asp.
