“The U.S. Data Federation supports data interoperability and harmonization across Federal, state, and local government agencies by highlighting common data formats, API specifications, and metadata vocabularies….The U.S. Data Federation will support government-wide data standardization and data federation initiatives across both Federal agencies and local governments. This is intended to be a fundamental coordinating mechanism for a more open and interconnected digital government by profiling and supporting use-cases that demonstrate unified and coherent data architectures across disparate government agencies. These examples will highlight emerging data standards and API initiatives across all levels of government, convey the level of maturity for each effort, and facilitate greater participation by government agencies. Initiatives that may be profiled within the U.S. Data Federation include Open311, DOT’s National Transit Map, the Project Open Data metadata schema, Contact USA, and the Police Data Initiative. As part of the U.S. Data Federation, GSA will also pilot the development of reusable components needed for a successful data federation strategy including schema documentation tools, schema validation tools, and automated data aggregation and normalization capabilities. The U.S. Data Federation will provide more sophisticated and seamless opportunities on the foundation of U.S. open data initiatives by allowing the public to more easily do comparative data analysis across government bodies and create applications that work across multiple government agencies.”