QDES User's Guide. National PDES Testbed Report Series
NATIONAL INST OF STANDARDS AND TECHNOLOGY GAITHERSBURG MD
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The Product Data Exchange Specification PDES is an emerging standard for the exchange of product information among various manufacturing applications. The neutral exchange medium for PDES product models is the STEP physical file format. The National PDES Testbed at NIST has developed QDES, a window-based editor for STEP product models. The editor, written in Smalltalk- 80, is schema-driven in the Testbed context, an Express information model is used to describe the objects to be manipulated QDES itself thus has no a priori knowledge of its domain. This document describes the operation of the editor. A tutorial is included. Data modeling, Express, PDES, QDES, Schema-independent software, Smalltalk, STEP.
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