The OPC UA Specifications are organised as a multi-part document. The following list of references provide link to each of the parts. Also referenced are applicable API documents. This companion specification assumes that all OPC UA Application support as a minimum version 1.02 of the OPC UA specifications.

Part 1: OPC UA Specification: Part 1 – Concepts

http://www.opcfoundation.org/UA/Part1/

Part 2: OPC UA Specification: Part 2 – Security Model

http://www.opcfoundation.org/UA/Part2/

Part 3: OPC UA Specification: Part 3 – Address Space Model

http://www.opcfoundation.org/UA/Part3/

Part 4: OPC UA Specification: Part 4 – Services

http://www.opcfoundation.org/UA/Part4/

Part 5: OPC UA Specification: Part 5 – Information Model

http://www.opcfoundation.org/UA/Part5/

Part 6: OPC UA Specification: Part 6 – Mappings

http://www.opcfoundation.org/UA/Part6/

Part 7: OPC UA Specification: Part 7 – Profiles

http://www.opcfoundation.org/UA/Part7/

Part 8: OPC UA Specification: Part 8 – Data Access

http://www.opcfoundation.org/UA/Part8/

Part 9: OPC UA Specification: Part 9 – Alarms and Conditions

http://www.opcfoundation.org/UA/Part9/

Part 10: OPC UA Specification: Part 10 – Programs

http://www.opcfoundation.org/UA/Part10/

Part 11: OPC UA Specification: Part 11 – Historical Access

http://www.opcfoundation.org/UA/Part11/

Part 12: OPC UA Specification: Part 12 – Discovery

http://www.opcfoundation.org/UA/Part12/

Part 13: OPC UA Specification: Part 13 - Aggregates

http://www.opcfoundation.org/UA/Part13/

API Standard 17F - Standard for Subsea Production Control Systems:

http://www.api.org/products-and-services/standards/purchase

The OPC UA Specifications are also available from the IEC as IEC 62541