Entities that exist in the RealWorld (or computer models/analogs for the same); also abstract concepts that are not easily defined - what, precisely, is "communism?" '''Don't answer that on this page please; it's a FlameWar that's wholly irrelevant here.''' As opposed to mathematical constructs (such as "integers" and "sets") that can be precisely defined. Examples of RealWorldEntities * Man-made objects (cars, chairs, guns, butter) * Computer objects describing elements of business processes (Invoice, Account, Customer) - whether or not there is a physical entity that the object represents. * Plants/animals/microbes, other biological phenomena * Other naturally occurring things * Ideologies * Roles that people may take on (what is a "doctor"? Someone with a medical degree? Someone who actively practices medicine? etc.) RealWorldEntities can be notoriously difficult to model. See ClassificationProblem ------- I have a feeling that we should roll this topic into other topics. It may not deserve its own topic just yet. -- AnonymousDonor Note that I did not create this topic. I say this because I have often been accused of creating too many topics and get blamed for some that I don't create. -- top