The term 'BLUEPRINT' is often used to refer to a detailed PLAN or diagram that serves as a guide for constructing something. The two crossword solutions for this term are 'schema' (6 letters) and 'PLAN' (4 letters). A schema is a structured framework or outline that can be used to organize information, while a PLAN is a detailed proposal or strategy for achieving a goal. Both of these terms can be used to describe a BLUEPRINT, which is a document that outlines the steps needed to create something.