QDES User's Guide. National PDES Testbed Report Series

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.

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Document Details

Document Type
Technical Report
Publication Date
Jun 29, 1990
Accession Number
ADA261272

Entities

People

  • Stephen N. Clark

Organizations

  • National Institute of Standards and Technology

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Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Automatic
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  • Commerce
  • Computer Programming
  • Computer Programs
  • Computers
  • Data Modeling
  • Environment
  • Feedback
  • Fish
  • Geometry
  • Language
  • Smalltalk Programming Language
  • Specifications
  • Standards
  • Topology
  • User Interface

Fields of Study

  • Computer science

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