Unified Architecture

Part 4: Services Title: Part 4: Services Description:

This specification is the most important of all OPC UA specifications, covering:


  • The UA Services (interfaces) that Servers and Clients must use
  • Server and Client behavior expectations
  • Common data-types used by Service parameters.

Also download the errata.


License: OPC Specifications Agreement of Use


OPC Foundation membership fees are used by the OPC Foundation for the continuous improvement of this specification, which includes bug-fixes and adding new features as required by the continuous advancement of the OPC Specifications.


Found a bug? Please report any bugs to our Mantis system. Click the "Tracking" tab for a list of current work items. We welcome your bug-fixes and kindly ask you to submit them via Mantis.


Have a Suggestion / Request for enhancement / New Features? Please Join an OPC Foundation Member Working Group (details may be found here). You may also submit requests to the OPC Foundation email address of. All suggestions become the property of the OPC Foundation.


Activities including bug-fixes and feature requests as reported in our Mantis bug-tracking system as described here.



Access: Registered User
Version Status Description Date Posted
1.05.00 Release OPC 10000-4 - Part 4 - Services (ZIP/PDF) 2021-10-27 Icon
1.04 Release OPC 10000-4 - Part 4: Services (ZIP/PDF) 2017-11-22 Icon
Version Status Description Date Posted
1.03 Release ZIP/PDF 2015-07-20 Icon
1.02 Release Specification 2012-03-18 Icon
1.01 Release 2009-02-08 Icon
1.00 Release 2006-07-31 Icon