  One of the modern paradigms to develop a system is object oriented analysis
and design. In this paradigm, there are several objects and each object plays
some specific roles. After identifying objects, the various relationships among
objects must be identified. This paper makes a literature review over
relationships among objects. Mainly, the relationships are three basic types,
including generalization/specialization, aggregation and association.This paper
presents five taxonomies for properties of the relationships. The first
taxonomy is based on temporal view. The second taxonomy is based on structure
and the third one relies on behavioral. The fourth taxonomy is specified on
mathematical view and fifth one related to the interface. Additionally, the
properties of the relationships are evaluated in a case study and several
recommendations are proposed.
