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Core idea
You can carry SSMDE inside any envelope (bus, file, API, DB). Interoperability is about placement, not semantic change.
# SSMDE block (portable unit)
{ "value": <...>, "align": <...>, "band": <...>, "manifest_id": "<...>", "stamp": "<...>" }
Disclosure modes (choose per audience)
Keep one payload shape; vary what you expose.
# value-only
{ "value": <...> }
# value+band (human ops)
{ "value": <...>, "band": "<...>", "manifest_id": "<...>" }
# full SSMDE (audit-grade)
{ "value": <...>, "align": <...>, "band": "<...>", "manifest_id": "<...>", "stamp": "SSMCLOCK1|...|sha256=...|prev=..." }
Rule: Hidden fields may be suppressed for privacy, but when present, meanings must match SSMDE.
Transport-agnostic patterns (copy-ready)
Message bus / stream
topic := "plant/lineA/thermal"
payload := {
"value": { "temperature_K": 296.42 },
"align": tanh( U / max(W, eps_w) ), # after clamp → atanh → fuse
"band": band_from_align(align, mid),
"manifest_id": mid,
"stamp": "SSMCLOCK1|2025-11-04T14:05:22Z|theta=132.77|sha256=9fde1c...|prev=72af0b..."
}
emit(topic, payload)
HTTP / REST (producer)
GET /api/v1/reading/thermo/lineA
200 OK
{
"value": { "temperature_K": 296.42 },
"align": 0.87,
"band": "GREEN",
"manifest_id": "THERMAL_LINE_COOLING_PLANT_A_v7",
"stamp": "SSMCLOCK1|2025-11-04T14:05:22Z|theta=132.77|sha256=9fde1c...|prev=72af0b..."
}
Webhook (consumer)
POST /receiver/ssmde
body := {
"value": { "cash_collected_usd": 18420.77 },
"align": -0.31,
"band": "A-",
"manifest_id": "AR_STABILITY_Q4_CLOSE_v2",
"stamp": "SSMCLOCK1|2025-11-04T14:06:41Z|theta=044.91|sha256=ab12d4...|prev=89c2aa..."
}
CSV / Parquet (bulk handoff)
timestamp_utc, value.temperature_K, align, band, manifest_id, stamp
2025-11-04T14:05:22Z, 296.42, 0.87, GREEN, THERMAL_LINE_COOLING_PLANT_A_v7, SSMCLOCK1|...|sha256=...|prev=...
Database / Warehouse
table ssmde_records (
ts_utc TIMESTAMP,
value_json JSONB,
align DOUBLE,
band TEXT,
manifest_id TEXT,
stamp TEXT,
PRIMARY KEY (ts_utc, manifest_id)
)
-- recommended indexes
INDEX idx_manifest_time (manifest_id, ts_utc)
INDEX idx_band_time (band, ts_utc)
Gateway computation (tiny edges, smarter hubs)
Compute align at an aggregation node if leaf devices are too small. Declare it in the manifest.
# normative dial
a_c := clamp(a_raw, -1+eps_a, +1-eps_a)
u := atanh(a_c)
U += w * u
W += w
align := tanh( U / max(W, eps_w) )
Backward compatibility (drop-in adoption)
Start by appending SSMDE fields to existing outputs.
legacy := { "voltage_V": 218.4 }
record := {
"value": legacy, # untouched fact
"align": tanh( U / max(W, eps_w) ), # bounded dial
"band": band_from_align(align, mid), # policy stance
"manifest_id": mid,
"stamp": "SSMCLOCK1|...|sha256=...|prev=..."
}
Do / Don’t (guardrails)
Do:
• Keep phi((m,a)) = m (value is byte-for-byte original)
• Keep -1 < align < +1 (bounded)
• Derive band via manifest cutpoints
• Ensure manifest_id resolves to immutable policy
• Use stamp to bind time+content+order where accountability matters
Don’t:
• Smooth or renormalize value then still call it value
• Emit unbounded “score” as align
• Hand-paint bands without manifest cutpoints
• Point manifest_id to mutable/opaque documents
• Replace stamp with a plain timestamp
Receiver checklist (quick verify)
[ ] sha256(bytes(canonical(record))) == parse(stamp,"sha256")
[ ] parse(stamp,"prev") chains to prior digest
[ ] -1 < align < +1
[ ] band == band_from_align(align, manifest_id)
[ ] manifest_id resolves and matches cutpoints used
[ ] phi((m,a)) = m holds (value unchanged)
Rollout plan (copy-ready)
Day 1 — Append SSMDE block; emit value, align, manifest_id.
Week 1 — Add band; publish cutpoints + promises in manifest; basic stamp.
Month 1 — Verify chains; index by manifest_id+time; enable disclosure modes; train ops on duty-of-care windows.
Navigation
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Next: SSMDE – Licensing and attribution (2.4)
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SSMDE – Table of Contents
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