  The theory introduced, presented and developed in this paper, is concerned
with Rough Concept Analysis. This theory is a synthesis of the theory of Rough
Sets pioneered by Zdzislaw Pawlak with the theory of Formal Concept Analysis
pioneered by Rudolf Wille. The central notion in this paper of a rough formal
concept combines in a natural fashion the notion of a rough set with the notion
of a formal concept: "rough set + formal concept = rough formal concept". A
follow-up paper will provide a synthesis of the two important data modeling
techniques: conceptual scaling of Formal Concept Analysis and
Entity-Relationship database modeling.
