Yggdrasil northbound FEEDER — consumes a governed equipment definition, provenance-verifies it, and streams live OPC-UA instance data to a Sparkplug B / MQTT UNS (NBIRTH carries the governed def byte-exact; egress-validated NDATA). Zero shared code with Bifrost.
A Sparkplug B Host Application in Python that gets the awkward parts right: bdSeq correlation so a stale Will can't mark a live node dead, sequence gaps treated as reordering before rebirth, rate-limited rebirth, dependency-free payload codec. 14 scenarios, no broker, ~1s.
Sparkplug B 및 통합 네임스페이스(UNS) 거버넌스 실증 랩: UDT 데이터 계약 레지스트리, Sparkplug 4.0 스키마·데이터 분리 프로토타입(#608), 엣지 레벨 2계층 제어 명령(NCMD) 인가, 손실 원장 기반 OPC UA 매핑, 상태 기반 Kafka 브리지, 런타임 스키마 드리프트 감지
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