We plan to add more information to our docs soon about the service, including a description of each of the traits, and possibly reference some of the many data

We plan to add more information to our docs soon about the service, including a description of each of the traits, and possibly reference some of the many data sources used. Meanwhile, you can do a search on "IBM System U" (the project's not-so-internal code name.) This particular slideshare.net prez has some great info on the methodology, validation tests and references: http://slidesha.re/1ri0vPV http://slidesha.re/1ri0vPV