The runtime object model:

• JourneyExecution required fields

• Event required fields

Event field naming to avoid collisions with Serialization type:

• Recommendation: Event.type = "Event" and Event.eventType = "<string>"

Ordering rules (timestamp order, tie-break behavior).

Reference rules:

• journeyRef (required for "aligned" conformance modes)

• stateRef / transitionRef resolution

Guidance for privacy (PII avoidance).

Minimal emitter levels (raw events only vs stateRef vs transitionRef).

Optional transition-observation events (cheap conformance).

Core journeyRef concept (versioned references)

Serialization timestamp and forward-compat rules