Unified OPC Architecture. Part 3: Address Space Model

This document outlines the technical specifications for the third component of the Unified Open Platform architecture, specifically focusing on the address space model. It establishes a standardized framework to define how data objects, variables, and methods are structured within industrial automation environments. The content provides detailed guidelines for representing information in a consistent manner, ensuring interoperability between different systems and manufacturers. By adhering to these principles, developers can create applications that communicate data using a common logical structure. The text covers the hierarchy of nodes, the relationships between them, and the mechanisms for accessing real-time and historical data. It serves as a foundational reference for designing software interfaces that support the broader ecosystem of automation technologies. The material is intended for engineers and architects involved in system integration, aiming to facilitate seamless data exchange across diverse hardware and software platforms without requiring proprietary modifications.