The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) 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 10000-9, OPC Unified Architecture - Part 9: Alarms and Conditions

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

OPC 10000-12, OPC Unified Architecture - Part 12: Discovery and Global Services

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

OPC 10000-18, OPC Unified Architecture - Part 18: Role-Based Security

http://www.opcfoundation.org/UA/Part18/

OPC 10000-21, OPC Unified Architecture - Part 21: Device Onboarding

http://www.opcfoundation.org/UA/Part21/

XML Schema Part 2: XML Schema Part 2: Datatypes

http://www.w3.org/TR/xmlschema-2/

SOAP Part 1, SOAP Version 1.2 Part 1: Messaging Framework

http://www.w3.org/TR/soap12-part1/

WS Addressing, Web Services Addressing (WS-Addressing)

http://www.w3.org/Submission/ws-addressing/

TLS, RFC 8446 – The Transport Layer Security (TLS) Protocol Version 1.3

https://datatracker.ietf.org/doc/html/rfc8446

X.509 v3, ISO/IEC 9594-8 (ITU-T Rec. X.509), Information technology – Open Systems

Interconnection – The Directory: Public-key and attribute certificate frameworks

https://www.iso.org/standard/72557.html

HTTP, Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing

https://datatracker.ietf.org/doc/html/rfc7230

HTTPS, HTTP Over TLS

http://www.ietf.org/rfc/rfc2818.txt

Base64, The Base16, Base32, and Base64 Data Encodings

https://datatracker.ietf.org/doc/html/rfc4648

X690, ISO/IEC 8825-1 (ITU-T Rec. X.690), Information technology – ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER)

https://www.iso.org/standard/35688.html

X200, ISO/IEC 7498-1 (ITU-T Rec. X.200), Information technology – Open Systems Interconnection – Basic Reference Model: The Basic Model

https://www.iso.org/standard/20269.html

IEEE 754, 60559-2020 - ISO/IEC/IEEE International Standard - Standard for Floating-Point Arithmetic

https://ieeexplore.ieee.org/document/9091348

HMAC, Keyed-Hashing for Message Authentication

http://www.ietf.org/rfc/rfc2104.txt

PKCS #1, RSA Cryptography Specifications Version 2.2

https://datatracker.ietf.org/doc/html/rfc8017

PKCS #12, Personal Information Exchange Syntax v1.1

https://datatracker.ietf.org/doc/html/rfc7292

FIPS 180-4, Secure Hash Standard (SHS)

https://csrc.nist.gov/publications/detail/fips/180/4/final

FIPS 197, Advanced Encryption Standard (AES)

https://www.nist.gov/publications/advanced-encryption-standard-aes

UTF-8, UTF-8, a transformation format of ISO 10646

https://datatracker.ietf.org/doc/html/rfc3629

RFC 5280, Internet X.509 Public Key Infrastructure Certificate

and Certificate Revocation List (CRL) Profile

https://datatracker.ietf.org/doc/html/rfc5280

RFC 4514, LDAP: String Representation of Distinguished Names

https://datatracker.ietf.org/doc/html/rfc4514

NTP, Network Time Protocol Version 4: Protocol and Algorithms Specification

https://datatracker.ietf.org/doc/html/rfc5905

RFC 3986, Uniform Resource Identifier (URI): Generic Syntax

https://datatracker.ietf.org/doc/html/rfc3986

RFC 8141, Uniform Resource Names (URNs)

https://datatracker.ietf.org/doc/html/rfc8141

RFC 6455, The WebSocket Protocol

https://datatracker.ietf.org/doc/html/rfc6455

RFC 8259, The JavaScript Object Notation (JSON) Data Interchange Format

https://datatracker.ietf.org/doc/html/rfc8259

RFC 7523, JSON Web Token (JWT) Profile for OAuth 2.0 Client Authentication and

Authorization Grants

https://datatracker.ietf.org/doc/html/rfc7523

RFC 5392, The OAuth 2.0 Authorization Framework

https://datatracker.ietf.org/doc/html/rfc6749

OpenID-Core, OpenID Connect Core 1.0

http://openid.net/specs/openid-connect-core-1_0.html

OpenID-Discovery, OpenID Connect Discovery 1.0

https://openid.net/specs/openid-connect-discovery-1_0.html

RFC 6960, X.509 Internet Public Key Infrastructure – Online Certificate Status Protocol – OCSP

https://datatracker.ietf.org/doc/html/rfc6960

RFC 5869, HMAC-based Extract-and-Expand Key Derivation Function (HKDF)

https://datatracker.ietf.org/doc/html/rfc5869

RFC 8422, Elliptic Curve Cryptography (ECC) Cipher Suites

https://datatracker.ietf.org/doc/html/rfc8422

RFC 6750, The OAuth 2.0 Authorization Framework: Bearer Token Usage

https://datatracker.ietf.org/doc/html/rfc6750

ISO 8601-1, Date and time - Representations for information interchange - Part 1: Basic rules

https://www.iso.org/standard/70907.html

RFC 5234, Augmented BNF for Syntax Specifications: ABNF

https://datatracker.ietf.org/doc/html/rfc5234

RFC 4151, The 'tag' URI Scheme

https://datatracker.ietf.org/doc/html/rfc4151

SemVer, Semantic Versioning 2.0.0

https://semver.org/spec/v2.0.0.html