. OPC Unified Architecture Part 5: Information Model. Release 1.05.00. 2020-10-12. , OPC Foundation, 2020.

This specification defines the Information Model of the OPC Unified Architecture (OPC UA). The document describes standardized nodes within the server's Address Space, including standard types and instances used for diagnostics or serving as entry points for server-specific nodes. It contains detailed structures for ObjectTypes, VariableTypes, ReferenceTypes, and DataTypes.