A Conceptual Data Model of Datum Systems

Published: September 23, 1999


Michael R. McCaleb


A new conceptual data model that addresses the geometric dimensioning and tolerancing concepts of datum systems, datums, datum features, datum targets, and the relationship among these concepts, is presented. Additionally, a portion of a related data model, Part 47 of STEP (ISO 10303-47), is reviewed and a comparison is made between it and the new conceptual data model.
Citation: Journal of Research (NIST JRES) -
Volume: 104
Issue: 4
Pub Type: NIST Pubs


data model, datum, datum feature, datum system, datum target
Created September 23, 1999, Updated February 19, 2017