Comprehension of Hierarchical ER Diagrams Compared to Flat ER Diagrams

Comprehension of Hierarchical ER Diagrams Compared to Flat ER Diagrams

Revital Danoch (Ben-Gurion University of the Negev, Israel), Peretz Shoval (Ben-Gurion University of the Negev, Israel) and Mira Balabaan (Ben-Gurion University of the Negev, Israel)
DOI: 10.4018/978-1-59140-375-3.ch012
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Abstract

HERD is a semi-algorithmic method for creating hierarchical ER diagrams from bottom up. The method is based on packaging operations that are applied in several steps on a given flat ER diagram. The result is a hierarchy of simple and interrelated diagrams (namely ER structures) with external relationships to other such diagrams. This chapter describes the application of HERD method using an example from a hospital domain, and an experiment in which we compare the comprehension of HERD diagrams with flat ER diagrams.

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