Technical Definitions: What is relation? relation Definition.

Free Definitions: Software: General

relation Definition

1. A subset of the {product} of two sets, R : A x B.  If (a, b) is an element of R then we write a R b, meaning a is related to b by R.  A relation may be: {reflexive} (a R a), {symmetric} (a R b => b R a), {transitive} (a R b & b R c => a R c), {antisymmetric} (a R b & b R a => a = b) or {total} (a R b or b R a). See {equivalence relation}, {partial ordering}, {pre-order}, {total ordering}. 2. A {table} in a {relational database}. (1995-02-28)

Definition Provided By Denis Howe