white paper

noun

1. A document based on research informing and educating a reader regarding a topic, which may also promote a product or a solution.
2. A parliamentary document announcing or proposing a government policy or action.

   “The report of the British Transport Commission to the Minister of Transport on its re-appraisal of the plan for the modernisation of British Railways has been published as a White Paper.”

3. Used other than figuratively or idiomatically: see white, paper.