The Web View Service has been accepted as an OGC Discussion Paper and is available at the OGC web page:
http://www.opengeospatial.org/standards/dp
http://portal.opengeospatial.org/files/?artifact_id=37257

09-166r2_web_view_service_discussion_paper.pdf specification document (pdf)

XML schemas will be posted soon.

Web View Service. Presentation at the OGC Technical Committee Meeting in Mountain View, CA, 12/08/2009, Benjamin Hagedorn, Dieter Hildebrandt. pdf

3D Portrayal Services - Use Cases. Presentation at the OGC Technical Committee Meeting in Atlanta 09/17/2008, Arne Schilling, Benjamin Hagedorn. pdf

Web Perspective View Service - Overview and Initiative. Presentation at the OGC Technical Committee Meeting in Potsdam, Germany, 06/04/2008, Benjamin Hagedorn. pdf

3D Portrayal Services - Use Cases. Discussion Paper on possible use cases of 3D portrayal services. pdf

Benjamin Hagedorn, Dieter Hildebrandt, Jürgen Döllner (2009): Towards Advanced and Interactive Web Perspective View Services. In: Developments in 3D Geo-Information Sciences, Lecture Notes in Geoinformation and Cartography, Springer, pp. 33–51, 2009. DOI: 10.1007/978-3-642-04791-6
Link to PDF version

Dieter Hildebrandt, Benjamin Hagedorn, Jürgen Döllner (2010): Image-Based, Interactive Visualization of Complex 3D Geovirtual Environments on Lightweight Devices. In: Proc. of the 7th Int. Symp. on LBS & TeleCartography
Link to publication server

Dieter Hildebrandt, Jan Klimke, Benjamin Hagedorn, Jürgen Döllner (2011): Service-Oriented Interactive 3D Visualization of Massive 3D City Models on Thin Clients. In: Proc. of the 2nd International Conference on Computing for Geospatial Research & Applications
Link to publication server