"Examples of applications or systems that are related to maintenance and/or diagnostics are disclosed in U.S. Pat. No. 6,094,600 entitled ???System and Method for Managing a Transaction Database of Records of Changes to Field Device Configurations??? (filed Feb. 6, 1996), U.S. Pat. No. 6,298,454 entitled ???Diagnostics in a Process Control System??? (filed Feb. 22, 1999), U.S. Patent Pub." . . . . .