[Philip Lelyveld comment; new data gathered by the gov't will be open by default.]
Under the terms of the Executive Order and a new Open Data Policy released today by the Office of Science and Technology Policy and the Office of Management and Budget, all newly generated government data will be required to be made available in open, machine-readable formats, greatly enhancing their accessibility and usefulness, while ensuring privacy and security.
Read the full story and watch the video here: http://www.whitehouse.gov/blog/2013/05/09/landmark-steps-liberate-open-data