MSID NIST
The Process 
Specification Language defines a neutral representation for 
manufacturing processes " "
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Date created: 5/10/2003
Last updated: 3/04/2004

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A Few PSL Basics...

For many years, the Manufacturing Systems Integration Division (MSID) has been involved in the definition of a neutral representation of product data, most recently realized through the STEP standard. With that effort well underway, another candidate area for a division focus is the representation of manufacturing process. Like product data, process data is also used throughout the life cycle of a product, from early indications of manufacturing process flagged during design, through process planning, validation, production scheduling and control. In addition, the notion of process also underlies the entire manufacturing cycle, coordinating the workflow within engineering and shop floor manufacturing.

The Process Specification Language (PSL) defines a neutral representation for manufacturing processes. Process data is used throughout the life cycle of a product, from early indications of manufacturing process flagged during design, through process planning, validation, production scheduling and control. In addition, the notion of process also underlies the entire manufacturing cycle, coordinating the workflow within engineering and shop floor manufacturing.

If you would like to learn more about PSL, including rationale and the need for its implementation, please continue.


Read more on the evolving PSL Standard:
PSL is being standardized within Joint Working Group 8 of Sub-committee 4 (Industrial data) and Sub-committee 5 (Manufacturing integration) of Technical committee ISO TC 184 (Industrial automation systems and integration). For more information about PSL standardization, see the ISO TC184/SC4 website.


Technical inquiries: PSL Team
Website comments: Webmaster

Manufacturing Systems Integration Division
NIST, 100 Bureau Drive, Stop 8260, Gaithersburg, MD 20899-8260.

what's new image


January 2004
Draft International Standard Ballot for ISO/DIS 18629-1 (PSL: Principles and Overview) was approved.


October 2003
ISO/DIS 18629-12 (PSL Outer Core) was submitted for Draft International Standard Ballot.

ISO/CD 18629-41 (Activitiy Ext.) and ISO/CD 18629-42 (Temporal and State Ext.) were submitted for Committee Draft Ballot.


June 2003
ISO/DIS 18629-11 (PSL Core) was submitted for Draft International Standard Ballot.


June 2003
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20 Questions” wizards are now available to assist in generating semantic mappings for translation.