NIST STEP Working Form Programmer's Reference. National PDES Testbed ReportSeries (Revised)

摘要

The Product Data Exchange Specification (PDES) is an emerging standard for theexchange of product information among various manufacturing applications. The neutral exchange medium for PDES product models is the Standard for the Exchange of Product Model Data (STEP) physical file format. The National PDES Testbed at the National Institute of Standards and Technology (NIST) has developed software to manipulate and translate STEP models. The software consists of an in-memory working form and an associated physical file parser, STEPparse. The internal operation of the STEPparse parser is described. The implementation of the data abstractions which make up the STEP Working Form is discussed, and specifications are given for the Working Form access functions. The creation of STEP translators using STEPparse is discussed.