  In this paper we continue the exploration of the classes of positively closed
and h-maximal model of an h-inductive theory in the context of positive logic.
In the section 2 we give a concrete description of the class of h-maximal
models of an h-inductive theory and theirs companion theories. The section 3 is
concerned to the study of the positive Robinson and locally positive Robinson
theories and their connexion with the properties of the class of h-maximal
models of the companion theories, and their connexion with the property of
elimination of quantifiers. Before dealing with the topics mentioned above we
give in section 1 a brief introduction to the positive model theory.
