blue print

noun4

1. •
   A detailed technical drawing (now often in some electronically storable and transmissible form).
2. •
   Any detailed plan, whether literal or figurative.

   • Ain't got no blueprint, just a purpose and a wrecking ball! — 2018
3. •
   A print produced with this process.
4. •
   A type of paper-based reproduction process producing white-on-blue images by means of a photosensitive ferric compound, used primarily for technical and architecture's drawings, now largely replaced by other technologies.