On indexed structures.

A structure on a non empty set X is a collection of subsets of X. Recently The authors introduced and studied hyper relations, micro relations on structures, structure union and structure intersection. This study reveals that these relations and operations do not helpful to introduce a topology of structures. The purpose of this paper is to investigate suitable relations and operations on structures so as to define a topology of structures. For this the notion of indexed structures is introduced and its basic properties have been discussed. [ABSTRACT FROM AUTHOR]