http://en.wikipedia.org/wiki/XACML would be one - it can be a little complicated...

garblegarble on May 4, 2014 | parent | context | favorite | on: Prose, a content editor for GitHub

http://en.wikipedia.org/wiki/XACML would be one - it can be a little complicated, but if you can get over that it's quite nice and also adds the idea of an Obligation (something that must be performed on a grant/deny - for example, logging/e-mailing)