Radke, Thomas Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
http://www.gac-grid.org/project-documents/deliverables/wp2/D2_9_Information_Providers.pdf (Any fulltext)
D2_9_Information_Providers.pdf (Any fulltext), 2MB
Braune, S., Breitling, F., Carlson, A., Högqvist, M., Radke, T., Scholl, T., et al.(2008). Advanced Prototype Implementation of Metadata Information Providers.