“For the first time, the United States government has agreed to release what we believe to be the largest index of government data in the world. On Friday, the Sunlight Foundation received a letter from the Office of Management and Budget (OMB) outlining how they plan to comply with our FOIA request from December 2013 for agency Enterprise Data Inventories. EDIs are comprehensive lists of a federal agency’s information holdings, providing an unprecedented view into data held internally across the government. Our FOIA request was submitted 14 months ago. These lists of the government’s data were not public, however, until now. More than a year after Sunlight’s FOIA request and with a lawsuit initiated by Sunlight about to be filed, we’re finally going to see what data the government holds. Sunlight’s FOIA request built on President Obama’s Open Data Executive Order, which first required agency-wide data indexes to be built and maintained. According to implementation guidance prepared in response to the executive order, Enterprise Data Inventories are intended to help agencies “develop a clear and comprehensive understanding of what data assets they possess” by accounting “for all data assets created or collected by the agency.”