OPCFoundation.NetStandard.Opc.Ua.XRegistry.Client

Opc.Ua.XRegistry.Client

The generic xRegistry registry client for OPC UA, built entirely on the source-generated ObjectType proxies. It talks to a registry hosted in an OPC UA server address space:

• Resolve document bytes from an opaque content key through the Opaque-NodeId fast path — a read of the node whose Identifier is the raw content-id bytes (no Browse, no fingerprint recomputation). The read is range-based, so a document larger than the session's MaxByteStringLength is fetched in slices rather than failing.
• Register a resource through the model's own lifecycle — CreateGroup / GetOrCreateGroup, CreateResource / GetOrCreateResource, and the FileType methods ResourceType inherits — plus Delete(ExpectedEpoch) for optimistic concurrency. Resource and Version Xid values remain stable structural paths when their document bytes change.

XRegistryClient is an abstract base carrying the xRegistry-level API; GenericXRegistryClient is the sealed implementation for any registry namespace. A concrete registry client (for example a schema registry client) derives from XRegistryClient and adds domain-specific naming and defaults; because a domain model subtypes the base types, the generated proxy chain mirrors the OPC UA hierarchy automatically.

The xRegistry 0.5.0 NodeSet also source-generates all 19 concrete *EventTypeRecord decoders and their EventFilters.Build(...) factories. Use them with the standard OPC UA subscription APIs; the package intentionally adds no parallel convenience subscription API.