Accession Number : ADA261272


Title :   QDES User's Guide. National PDES Testbed Report Series


Corporate Author : NATIONAL INST OF STANDARDS AND TECHNOLOGY GAITHERSBURG MD


Personal Author(s) : Clark, Stephen N


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a261272.pdf


Report Date : 29 Jun 1990


Pagination or Media Count : 41


Abstract : 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.


Descriptors :   *COMPUTER PROGRAMS , *SOFTWARE ENGINEERING , *DATA PROCESSING , PROGRAMMING MANUALS , MANUFACTURING , COMPUTER AIDED DESIGN , MODELS , SPECIFICATIONS , DOCUMENTS , OPERATION , STANDARDS , COMPUTER AIDED MANUFACTURING , COMPUTER PROGRAM VERIFICATION


Subject Categories : Computer Programming and Software


Distribution Statement : APPROVED FOR PUBLIC RELEASE