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What is Fact Type

Chapter 155
Encyclopedia of Information Science and Technology, Third Edition
In ORM, a fact is a proposition taken to be true by the business community that either applies a logical predicate to a sequence of one or more objects of a given type, or simply asserts the existence of a given object. A fact type is a set of all possible instances of the same kind of fact. For example: Person smokes; Person was born in Country; Person introduced Person to Person. In UML, a non-unary fact type is an association.
Published in Chapter:
A Comparative Review of Data Modeling in UML and ORM
Terry Halpin (INTI International University, Malaysia)
Copyright: © 2015 |Pages: 9
DOI: 10.4018/978-1-4666-5888-2.ch155
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