… entity-relationship model, which has most of the advantages of the above three models. The
entity-relationship model … This paper uses the entity-relationship model as a framework from …

… In this paper, we presented an extension to the entity-relationship model to allow direct
modeling of the important semantic concepts of generalization, ISA-hierarchies, roles, structural …

… First, the data requirements are conceptualized using an extended entity-relationship model,
… The extended entityrelationship model is then decomposed according to a set of basic entity…

… HISTORICAL BACKGROUND The entity-relationship model has been … entity-relationship
model have led to the introduction of the higherorder or hierarchical entity-relationship model [8…

… Anenriched entity relationship model is chosen as the data … design in the entity relationship
model is the equivalent of … total or partial sion of the entity relationship model proposed in [6]. …

Nearly all query languages discussed recently for the Entity-Relationship (ER) model do not
possess a formal semantics. Languages are often defined by means of examples only. The …

The importance of the Entity-Relationship in the understanding of data base design is discussed
as is the relative importance that many Universities give to its teaching. The amount of …

… This chapter introduces an extended entity-relationship model. Structural extensions are
complex … Therefore, extended entity-relationship model languages are supported by explicit …

… We now introduce the structural part of the higher-order entity-relationship model. In this
section, it will be shown that a well-founded theory exists for this model. In addition to the …

… aspects that call for special modeling techniques and constructs for the conceptual design
of geographic applications we develop and present the Geographic Entity-Relationship Model …