If you encountered this specific filename and term in a community forum or file-sharing site, it may refer to one of the following:
An unofficial leak or collection of early design papers (sometimes called "white papers" or "deep design papers") from the developer. Bones.Cafe.rar
Could you clarify or what specific information you are hoping to find within the "deep paper"? Cozy Games Perfect for the Spooky Season - LadiesGamers If you encountered this specific filename and term