The ISO standard "STEP" provides a complete representation of a product alo
ng with a description language, EXPRESS, and methods for the exchange of th
ese product data. This paper presents the methodology that nas adopted whil
e creating a prototype of an electromagnetism dedicated database manager, m
eant to support STEP compliant exchanges. The STEP architecture and mechani
sms are described. The resulting Java application has been tested through n
eutral file generation and reading.