The following referenced documents are indispensable for the application of this specification. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments and errata) applies.
OPC 10000-1, OPC Unified Architecture - Part 1: Overview and Concepts
http://www.opcfoundation.org/UA/Part1/
OPC 10000-2, OPC Unified Architecture - Part 2: Security Model
http://www.opcfoundation.org/UA/Part2/
OPC 10000-3, OPC Unified Architecture - Part 3: Address Space Model
http://www.opcfoundation.org/UA/Part3/
OPC 10000-4, OPC Unified Architecture - Part 4: Services
http://www.opcfoundation.org/UA/Part4/
OPC 10000-5, OPC Unified Architecture - Part 5: Information Model
http://www.opcfoundation.org/UA/Part5/
OPC 10000-6, OPC Unified Architecture - Part 6: Mappings
http://www.opcfoundation.org/UA/Part6/
OPC 10000-7, OPC Unified Architecture - Part 7: Profiles
http://www.opcfoundation.org/UA/Part7/
OPC 10000-8, OPC Unified Architecture - Part 8: Data Access
http://www.opcfoundation.org/UA/Part8/
OPC 10000-19, OPC Unified Architecture - Part 19: Dictionary Reference
http://www.opcfoundation.org/UA/Part19/
OPC 10000-100, OPC Unified Architecture - Part 100: Devices
http://www.opcfoundation.org/UA/Part100/
IEC 62769, Field Device Integration (FDI)
https://webstore.iec.ch/searchform&q=62769
NAMUR Recommendation
https://www.namur.net/en/recommendations-and-worksheets/current-nena.html
NE107: Self-monitoring and diagnosis of field devices
NE131: NAMUR standard device - Field devices for standard applications
NE175: NAMUR Open Architecture (NOA)
IEC 61987 Common Data Dictionary (CDD)