OPCFoundation.NetStandard.Opc.Ua.OpenUsd

Opc.Ua.OpenUsd

Draft OPC UA - OpenUSD Bindings and OpenUSD Scene Materialization companion information models for the OPC UA .NET Standard stack.

Bindings model

The source-generated Opc.Ua.OpenUsd namespace describes an external OpenUSD stage and binds OPC UA values to it:

• OpenUsdRootType, OpenUsdStageType, and OpenUsdRepresentationType;
• live, alarm, history, and command binding types;
• component composition and aggregation;
• content integrity and Part 5 asset delivery metadata.

The generic, dependency-injectable connector lives in Opc.Ua.OpenUsd.Client.

Scene materialization model

The source-generated Opc.Ua.OpenUsd.Scene namespace describes a USD stage materialized inside an OPC UA address space:

• stage and prim types, including UsdGeom and UsdShade typed prims;
• attributes, relationships, composition arcs, variant sets, and applied API schemas;
• georeferencing types;
• USD value-role DataTypes and reference types.

The same namespace contains the scene document/value model (UsdStage, UsdPrim, UsdAttribute, UsdValue, and related types). The Opc.Ua.OpenUsd.Scene.Conversion namespace provides:

• .usda reading and writing;
• value coercion and OPC UA DataType mapping;
• deterministic scene signatures.

UsdValue implements INullable; use UsdValue.Null and its TryGet* accessors rather than nullable wrappers or boxed values.

Server-side authoring, asset delivery, materialization, export, discovery, and Part 1 interop live in Opc.Ua.OpenUsd.Server.

Both companion models are drafts published for review. Their model shapes and NodeIds may change until the specifications are ratified.

Scene namespace URI: http://opcfoundation.org/UA/OpenUSD/Scene/