Re: Binary Relational Modeling call
From: Ivan <ivanvodisek_at_gmail.com>
Date: Fri, 16 Sep 2011 04:23:59 -0700 (PDT)
Message-ID: <c2d22729-8076-4b6b-8110-262b376d32c6_at_glegroupsg2000goo.googlegroups.com>
Date: Fri, 16 Sep 2011 04:23:59 -0700 (PDT)
Message-ID: <c2d22729-8076-4b6b-8110-262b376d32c6_at_glegroupsg2000goo.googlegroups.com>
wiki:
wiki:
"A relation is a data structure which consists of a heading and an unordered set of tuples which share the same type."
"In mathematics, a binary relation on a set A is a collection of ordered pairs of elements of A. In other words, it is a subset of the Cartesian product A2 = A × A. More generally, a binary relation between two sets A and B is a subset of A × B."
says nothing about difference between "relation" and "relationships". binary relations? exactly what i have in mind: every binary relation can be implemented as table of pairs (2 field tuples) of references to sets' elements. Received on Fri Sep 16 2011 - 13:23:59 CEST