Some High Level Language Constructs for Data of Type Relation

Abstract

For the extension of high level languages by data types of mode relation, three language constructs are proposed and discussed: a repetition statement controlled by relations, predicates as a generalization of Boolean expressions, and a constructor for relations using predicates. The language constructs are developed step by step starting with a set of elementary operations on relations. They are designed to fit into PASCAL without introducing too many additional concepts. © 1977, ACM. All rights reserved. © 1977, ACM. All rights reserved.