Schema Posted on 21st December 20159th May 2021 by ThePD (The Project Definition) Schema is the organisation or structure of the database that is a representation of a plan or theory in the form of an outline or model. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in Business and tagged analysis. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.