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General Questions
What is UMA?
User-Managed Access (UMA, pronounced "OOH-mah" like the [given name|http://en.wikipedia.org/wiki/Uma_(given_name)]) is a protocol designed to give a web user a unified control point for authorizing who and what can get access to their online personal data (such as identity attributes), content (such as photos), and services (such as viewing and creating status updates), no matter where all those things live on the web.
UMA allows a user to make demands of the requesting side in order to test their suitability for receiving authorization. These demands can include requests for information (such as