{
  "schema": "8db-website-evaluation-fixture/v1",
  "reviewed": "2026-09-18",
  "purpose": "Portable semantic example and evaluation brief. Not an 8DB API request, runtime result, benchmark or release qualification.",
  "evaluation_fields_to_complete": [
    "8DB build/commit and SDK",
    "target hardware and operating system",
    "input adapters and representation",
    "authorization/protection requirements",
    "persistence and recovery requirements",
    "expected result and reference oracle",
    "matched alternative and configuration",
    "database-stage and complete-job measurement boundaries"
  ],
  "scenario": "observation-decisions",
  "source_scope": "Semantics from Time-Series Overview and Status Ledger 2026-09-13/14; values below are illustrative, not recorded sensor measurements.",
  "clock": "illustrative integer ticks",
  "cadence": 1,
  "deployment_ticks": [
    0,
    1,
    2,
    3
  ],
  "detection_floor": 5,
  "observations_v1": [
    {
      "tick": 0,
      "kind": "Point",
      "value": 8
    },
    {
      "tick": 1,
      "kind": "BelowDetection",
      "floor": 5
    },
    {
      "tick": 3,
      "kind": "Point",
      "value": 9
    }
  ],
  "late_observation_v2": {
    "tick": 2,
    "kind": "Point",
    "value": 7
  },
  "expected": {
    "v1": {
      "present_observations": 3,
      "gaps": [
        2
      ],
      "censored_ticks": [
        1
      ]
    },
    "v2": {
      "present_observations": 4,
      "gaps": [],
      "censored_ticks": [
        1
      ]
    },
    "reread_v1_after_v2": "Same semantic result as v1"
  },
  "qualification_checks": [
    "Confirm the carrier request schema and response types for the selected build.",
    "Do not replace the gap with zero or an interpolated observation.",
    "Do not treat the detection floor as a measured value.",
    "Verify late-read version semantics and persistence/reopen.",
    "For DTW consumption, specify Refuse or PresentOnly gap handling and inspect coverage.",
    "Include ingestion, network and output assembly in full-job measurements."
  ],
  "public_reading": "https://8braid.com/journal/the-data-layer-under-predictive-sustainment"
}