Module types 

Plain data types moved across the crate::Driver trait boundary.

Structs

BrowseBreadcrumb

One navigation step associated with a search match.

BrowseNode

One child returned by a browse page.

BrowsePage

One bounded page of immediate children and its continuation metadata.

BrowsePageRequest

Parameters for one browse-page request. The connected driver supplies its configured OPC server; callers only provide session/navigation state returned by earlier pages.

DriverCapabilities

Gateway and namespace features reported for one OPC server.

IndexSchedulerDiagnostics

Scheduler and retry information for a persistent namespace index.

IndexedSearchMatch

One selectable result from the persistent namespace index.

IndexedSearchProgress

Progress reported for a running persistent namespace inventory.

SearchCompleted

Terminal search metadata.

SearchIndexRequest

Parameters for one persistent-index query. The connected driver supplies its configured OPC DA server, just as it does for SearchRequest.

SearchIndexResponse

Ranked persistent-index matches plus snapshot readiness metadata.

SearchIndexStatus

Persistent namespace-index state and build metadata.

SearchMatch

A progressively emitted namespace-search result.

SearchProgress

Progress emitted while a namespace search is still running.

SearchRequest

Parameters for a bounded namespace search.

TagValue

One tag’s freshly read value, as returned by crate::Driver::read.

WriteOutcome

The result of one crate::Driver::write call that reached the driver.

Enums

BrowseNodeKind

Whether a browse node is expandable, selectable as an OPC item, or both.

BrowseSource

Native or configured strategy that produced browse results.

NamespaceOrganization

How the OPC server organizes its namespace.

Quality

How much a TagValue should be trusted, mirroring OPC’s own three-state quality model rather than collapsing it to a bool. “Uncertain” (e.g. a value held at its last known reading during a brief comms hiccup) is a real, actionable distinction from outright bad quality — not merely a presentation nuance — so callers that need to decide whether to trust a reading can react to it directly rather than losing the distinction.

SearchEvent

One event from the driver’s namespace-search stream.

SearchIndexControlAction

Operator action applied to an active namespace-index build.

SearchIndexState

Readiness of a gateway-owned persistent namespace index.

SearchMatchMode

Match behavior for namespace search.

TagWrite

A value to write to a tag via crate::Driver::write.

Type Aliases

TagId

An identifier for one tag/item a crate::Driver knows how to read or write. For OPC DA this is the fully-qualified item name (e.g. "Area1.LIC101.PV", matching bhtune_core::tags::LoopTags’s tag fields exactly); other drivers may use any string convention of their own, since only the implementing driver interprets it.