New to this mailing list, so excuse my innocence: Today I see two questions about standards. Some time ago I was looking for what I think is similar, and was pointed to the XAS data base http://cars.uchicago.edu/xaslib/about/. If I understand the questions properly, this database may be of great help. It was to me. I thank the people organizing it, Matt Newville and Bruce Ravel, for their great service to the community in volunteering to make seemingly reliable data available in a convenient way. Nino