XML-Data Access Title: XML-Data Access Description:

This specifications describes the behavior of OPC applications that support Data Access using XML, covering:


  • Overview and purpose of XML based Data Access
  • Overview of general architecture and methodologies for enabling OPC DA behavior in a web-services model
  • Detailed descriptions of methods, parameters, and expected behaviors
  • Detailed descriptions of data types and structures
  • XML schema containing method definitions


WSDL Schema:



License: OPC Specifications Agreement of Use


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This specification is complete and no longer maintained.


Access: Paid Members
Version Status Description Date Posted
1.01 Release Specification Icon
Version Status Description Date Posted