https://www.nist.gov/publications/conceptual-data-model-datum-systems
A new conceptual data model that addresses the geometric dimensioning and tolerancing concepts of datum systems, datums, datum features, datum targets, and the
conceptual data modeldatumsystemsnist
https://www.process.st/how-to/create-a-conceptual-logical-and-physical-data-model-in-microsoft-visio/
Learn how to efficiently create a conceptual, logical, and physical data model in Microsoft Visio, empowering you to visualize and organize your data...
physical data modelcreateconceptuallogical