{ "protocol": { "name": "CVP", "version": "1.0.0-proposed", "revision": "2026-09-13", "spec_sha256": "f62725968356c92930531cd6085db76e216da06e95be53d636b0d2cf3218b148", "spec": "https://www.calculatorx.com/developers/cvp/spec/1.0" }, "document_status": "proposed", "calculator": { "id": "convert-units", "version": "0.1.1", "title": "UUCE unit conversion", "formula_family": "registered_unit_conversion", "capability_id": "units.convert", "verification_revision": "2026-11-05.uuce-c6-v1" }, "profile": "engineering", "verified_scope": "The enumerated reference cases and rejection partitions under the pinned snapshot, including independent definition checks for all 304 units across 68 quantity kinds in the pinned snapshot, with explicit scalar/point/interval semantics and temperature component roles; both directions of all 320 unit-kind-role slots relative to their reference unit; exact rational and symbolic pi results and sampled numeric boundaries.", "deferred_scope": "Unlisted unit pairs, correct rounding against true pi at every boundary, contextual models, measurement uncertainty and calculator-internal integration.", "status": "VERIFIED", "verification_status": "VERIFIED", "production_freshness": "CURRENT", "overall_trust": "VERIFIED", "runner": { "name": "cvp-runner", "version": "1.0.0" }, "environment": { "runtime": "node", "runtime_version": "22.20.0", "numeric_model": "Exact reduced rational × symbolic pi power; separate declared decimal and binary64 projections", "os": "darwin" }, "suite": { "id": "convert-units", "version": "0.1.1", "uri": "https://www.calculatorx.com/evidence/units.convert/0.1.1.json", "verification_revision": "2026-11-05.uuce-c6-v1" }, "obligation_set": [ "CVP-PROV-01", "CVP-MODEL-01", "CVP-SCOPE-01", "CVP-UNIT-01", "CVP-REF-01", "CVP-GOLD-01", "CVP-BND-01", "CVP-INV-01", "CVP-NUM-01", "CVP-COV-01", "CVP-CONTRACT-01", "CVP-DEP-01", "CVP-ART-01", "CVP-PROD-01", "CVP-DIM-01", "CVP-PROP-01", "CVP-META-01", "CVP-ROUND-01", "CVP-IFACE-01" ], "provenance": { "mode": "direct", "sources": [ { "label": "BIPM SI Brochure", "kind": "standard", "reference": "SI units of plane angle and Celsius temperature", "url": "https://www.bipm.org/en/publications/si-brochure" }, { "label": "NIST revised unit conversion factors", "kind": "other", "reference": "International foot and U.S. survey foot", "url": "https://www.nist.gov/pml/us-surveyfoot/revised-unit-conversion-factors" }, { "label": "NIST Guide to the SI", "kind": "other", "reference": "Appendix B.8 temperature intervals and points", "url": "https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8" } ] }, "controls": { "CVP-PROV-01": { "result": "PASS", "applicability": "required", "notes": "Sources present on evidence" }, "CVP-MODEL-01": { "result": "PASS", "applicability": "required", "notes": "Compose registered scale and offset relative to a common reference unit." }, "CVP-SCOPE-01": { "result": "PASS", "applicability": "required", "notes": "Fixed snapshot and explicit quantity kind and role." }, "CVP-UNIT-01": { "result": "PASS", "applicability": "required", "notes": "unit model: Explicit unit IDs, quantity kind and scalar/point/interval role. conversion: Exact normalized scale and offset; symbolic pi retained. mixed-unit input: One input value and two explicit units" }, "CVP-REF-01": { "result": "PASS", "applicability": "required", "notes": "O1 model + O2 expected_values + O2 numerical_behavior" }, "CVP-GOLD-01": { "result": "PASS", "applicability": "required", "notes": "5/5 legacy golden; 1259/1259 oracle-backed numeric" }, "CVP-BND-01": { "result": "PASS", "applicability": "required", "notes": "0/0 numeric-edge Evidence + 2791/2791 near-singularity numeric; illegal enum/system is Invalid only" }, "CVP-INV-01": { "result": "PASS", "applicability": "required", "notes": "0 Evidence illegal-input + 689/689 oracle-backed error-code (exact_error_match, not ULP)" }, "CVP-NUM-01": { "result": "PASS", "applicability": "required", "notes": "Strict symbolic/result field identity and explicit boundary predicates; no ULP claim for this pack." }, "CVP-COV-01": { "result": "PASS", "applicability": "required", "notes": "70/70 declared partitions (length, temperature, plane_angle, angular_velocity, mass, duration, frequency, speed, acceleration, area, volume, section_modulus, area_moment, force, pressure, energy, torque, power, electric_current, electric_potential, electric_charge, resistance, capacitance, inductance, magnetic_flux, magnetic_flux_density, electrical_conductance, electrical_resistivity, electrical_conductivity, apparent_power, reactive_power, voltage_temperature_coefficient, transconductance_parameter, resistance_per_length, amount_of_substance, volume_flow_rate, mass_flow_rate, mass_density, mass_concentration, amount_concentration, molar_mass, dynamic_viscosity, kinematic_viscosity, surface_tension, thermal_conductivity, heat_transfer_coefficient, thermal_resistance, specific_heat_capacity, heat_capacity, specific_energy, temperature_coefficient, momentum, areal_mass_density, solid_angle, ratio, luminous_intensity, luminous_flux, illuminance, irradiance, luminance, luminous_efficacy, radioactivity, absorbed_dose, dose_equivalent, catalytic_activity, inverse_time, information, information_rate, numeric-boundary, invalid-domain) · 5 legacy golden / 2791 CVP boundary unique cases · 0 Evidence invalid-input (may overlap boundary)" }, "CVP-CONTRACT-01": { "result": "PASS", "applicability": "required", "notes": "3/3 CVP contract · rest-mcp-parity=PASS · published-json-schemas=PASS · snapshot-projection=PASS" }, "CVP-DEP-01": { "result": "PASS", "applicability": "required", "notes": "The execution projection, definition digest and numerical policy are pinned by the unit contract and CVP fingerprint." }, "CVP-ART-01": { "result": "PASS", "applicability": "required", "notes": "release_integrity.status=verified · digests: artifact_evidence_sha256=Evidence core (Trust freshness) · cvp_evidence_digest=artifacts.evidence_digest (fingerprint v2) · evidence_bundle_sha256=legacy Evidence JSON bytes · evidence_catalog_digest=attested_catalog_sha256 · production_sha256=bound production report · see artifacts.digest_registry" }, "CVP-PROD-01": { "result": "PASS", "applicability": "required", "notes": "this calculator CURRENT · bound snapshot pass @ 2026-11-05T10:54:03.563Z · live site-wide report stale @ 2026-11-05T10:54:07.037Z (1 other capabilities) · local checks pass · attestation_id=3ae68e6245d147b5158cf133dff5e79629bd3686d69baf46099e38f7129f1eab · This calculator CURRENT · This calculator is not affected · Bound attestation PASS @ 2026-11-05T10:54:03.563Z · Live production status STALE (1 capability; 374 remain CURRENT) @ 2026-11-05T10:54:07.037Z · Public schema 0.1.1 matches · Semantic contract ✓ · Production attested · schema_const=0.1.1 · report output-const=pass · evidence-sha256=pass · cvp-manifest-public-origin-agree=pass · cvp-latest-alias-agrees=pass · cvp-immutable-manifest-sha256=pass · attested_evidence_sha256=3cdb50acf3c1f67117818ebe703a0ee0bdce0ab79390f78f1ab431480b9cf6e6 · verified_at=2026-11-05T09:48:31.357Z · evidence_attested_at=2026-11-05T09:48:31.357Z · last_confirmed_current_at=2026-11-05T10:54:03.563Z · rendered_at=2026-11-05T10:54:22.620Z · binds=cvp_core_sha256", "check_result": "PASS", "production_state": "CURRENT", "binding_current": true }, "CVP-DIM-01": { "result": "PASS", "applicability": "applicable", "notes": "Declared quantity kind, reference unit and role must agree." }, "CVP-PROP-01": { "result": "PASS", "applicability": "applicable", "notes": "1/1 property" }, "CVP-META-01": { "result": "PASS", "applicability": "applicable", "notes": "1/1 metamorphic" }, "CVP-ROUND-01": { "result": "PASS", "applicability": "applicable", "notes": "1/1 round-trips" }, "CVP-XCAL-01": { "result": "SKIP", "applicability": "not_applicable", "notes": "No related calculator in the same formula family / no related-identity peers declared — control not in obligation set" }, "CVP-IFACE-01": { "result": "PASS", "applicability": "applicable", "notes": "REST and MCP JSON-RPC: 4737/4737; execution is machine-only." }, "CVP-ORACLE-01": { "result": "SKIP", "applicability": "higher_assurance", "notes": "O2 present; O3 not required this wave" }, "CVP-EXP-01": { "result": "SKIP", "applicability": "optional", "notes": "named expert review not performed" } }, "interfaces": { "compared": [ "rest", "mcp" ], "result": "PASS", "notes": "REST and MCP JSON-RPC: 4737/4737; execution is machine-only." }, "artifacts": { "evidence_bundle_sha256": "b7067d0f51d70aec9738e3300a72e0559cf891ac603eb320db04c59ecce114bf", "evidence_digest": "151ae77934023fa10e8c6e4fdb34352a6aee9e973a9b345e304f5c34791518e8", "production_sha256": "3cdb50acf3c1f67117818ebe703a0ee0bdce0ab79390f78f1ab431480b9cf6e6", "attested_catalog_sha256": "3e6fd76c0af24d3888c9b7b92671d8c7d9747aa7bc019f3e9afd19f5b0e9feee", "production_checks": [ { "id": "units.convert:output-const", "status": "pass", "detail": "0.1.1", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-11-05T09:48:31.357Z" }, { "id": "units.convert:evidence-sha256", "status": "pass", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-11-05T09:48:31.357Z" }, { "id": "units.convert:cvp-manifest-public-origin-agree", "status": "pass", "detail": "units.convert/0.1.1/2026-11-05.uuce-c6-v1/engineering/151ae7793402", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-11-05T09:48:31.357Z", "projection_compared": false }, { "id": "units.convert:cvp-latest-alias-agrees", "status": "pass", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-11-05T09:48:31.357Z", "detail": "units.convert/0.1.1/2026-11-05.uuce-c6-v1/engineering/151ae7793402", "projection_compared": false }, { "id": "units.convert:cvp-immutable-manifest-sha256", "status": "pass", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-11-05T09:48:31.357Z" } ], "digest_registry": { "digest_algorithm": "sha256", "canonicalization": "json-sorted-keys-utf8", "entries": [ { "name": "cvp_core_sha256", "field": "artifacts.cvp_core_sha256", "digest_scope": "cvp_verification_fingerprint_v2", "value": "151ae77934023fa10e8c6e4fdb34352a6aee9e973a9b345e304f5c34791518e8", "note": "Immutable verification core; excludes attestation/live-status and Evidence contract counts" }, { "name": "cvp_evidence_digest", "field": "artifacts.evidence_digest", "digest_scope": "cvp_verification_fingerprint_v2", "value": "151ae77934023fa10e8c6e4fdb34352a6aee9e973a9b345e304f5c34791518e8", "note": "Alias of cvp_core_sha256 (historical field name)" }, { "name": "artifact_evidence_sha256", "field": "release_integrity.digests.evidence_core_sha256", "digest_scope": "evidence_artifact_core", "value": "94aa01c30301cdd33a8352533f08c5817b45e1c51bd1d2a3454bb7afb90544e7", "note": "Published Evidence JSON core — Trust freshness / production bind subject" }, { "name": "evidence_catalog_digest", "field": "artifacts.attested_catalog_sha256", "digest_scope": "capability_catalog", "value": "3e6fd76c0af24d3888c9b7b92671d8c7d9747aa7bc019f3e9afd19f5b0e9feee", "note": "Capability catalog integrity; site-wide, not per-suite fingerprint" } ] }, "cvp_core_sha256": "151ae77934023fa10e8c6e4fdb34352a6aee9e973a9b345e304f5c34791518e8" }, "dependencies": [ { "name": "units.convert-engine", "version": "0.1.1" }, { "name": "units.convert-reference-oracle", "version": "1.0.0" }, { "name": "node", "version": "22.20.0" } ], "attestation": { "status": "CURRENT", "href": "/.well-known/calculatorx-production-attestation.json", "id": "3ae68e6245d147b5158cf133dff5e79629bd3686d69baf46099e38f7129f1eab", "attested_at": "2026-11-05T09:48:31.357Z", "last_confirmed_current_at": "2026-11-05T10:54:03.563Z", "site_attestation_current": false, "capability_attestation_current": true, "bound_snapshot_status": "pass", "live_report_status": "stale", "bound_attested_at": "2026-11-05T10:54:03.563Z", "live_updated_at": "2026-11-05T10:54:07.037Z", "bound_snapshot": { "status": "pass", "attested_at": "2026-11-05T10:54:03.563Z", "site_stale_count": 1 }, "live_site_status": { "href": "/.well-known/calculatorx-production-attestation.json" }, "bound_snapshot_site_stale_count": 1, "site_stale_capability_count": 1, "evidence_attested_at": "2026-11-05T09:48:31.357Z" }, "domain_review": { "status": "ABSENT", "spec_version": "0.1.1", "external_third_party": false, "note": "Named expert review not performed" }, "timestamps": { "verified_at": "2026-11-05T09:48:31.357Z", "generated_at": "2026-11-05T09:48:31.357Z", "rendered_at": "2026-11-05T10:54:22.620Z", "notes": "verified_at/generated_at mark the first publication of this cvp_core_sha256 (artifacts.evidence_digest alias) for suite verification. evidence_attested_at/attested_at is the first production bind of that core digest. last_confirmed_current_at is the latest site-wide report that still confirms CURRENT. rendered_at is this JSON serialization and is not part of cvp_core_sha256 / evidence_digest. Production attestation binds cvp_core_sha256 (binds evidence_digest). Causal order: verified_at ≤ evidence_attested_at ≤ last_confirmed_current_at. attestation.bound_snapshot.site_stale_count is the site-wide stale capability count at Manifest bind time — not a live value. Fetch attestation.live_site_status.href for the current site report." }, "unit_contract": { "model": "Explicit unit IDs, quantity kind and scalar/point/interval role", "conversion": "Exact normalized scale and offset; symbolic pi retained", "mixed_unit_input": "One input value and two explicit units", "snapshot_version": "0.3.0-preview.3", "snapshot_definition_sha256": "75c66c1e40753435643e728731261a8b7e4c760649cb662c5883249d1f2ecacb", "execution_projection_sha256": "b22cd71baa090908c21a75a86b52d87cab1be0bd2f965156e40c166f2442fbc4", "integrity_manifest_sha256": "ec4360ac1db7cfa18550d955fe4afca333295b74b2348bfd6a40cf8419d0aef0", "public_vectors_sha256": "4b8a45a15929d4b3953436acd14bc06f92537a03e0e163ec0a1af5798a92ced7", "numerical_policy": "uuce-rational-pi-decimal34-v1" }, "tests": { "golden": { "passed": 1259, "total": 1259, "failed": 0 }, "boundary": { "passed": 2791, "total": 2791, "failed": 0 }, "invalid": { "passed": 689, "total": 689, "failed": 0, "comparison": "exact_error_match" }, "property": { "passed": 1, "total": 1, "failed": 0 }, "round_trip": { "passed": 1, "total": 1, "failed": 0 }, "metamorphic": { "passed": 1, "total": 1, "failed": 0 }, "contract": { "passed": 3, "total": 3, "failed": 0 }, "cross_interface": { "passed": 4737, "total": 4737, "failed": 0 } }, "numerical": { "representation": "Exact reduced rational and symbolic pi power with separate finite or unavailable numeric projections", "tolerance": { "type": "exact", "value": 0, "declared_before_evaluation": true, "rationale": "Specified exact fields must match the independent reference." }, "claim_scope": "Strict identity of the fields independently specified in each case. No ULP measurement for symbolic or unavailable numeric projections.", "criterion": "declared_field_identity", "ulp_applicable": false, "exact_mismatches": 0 }, "coverage": { "partitions": [ { "id": "length", "description": "length", "exercised": true, "case_count": 206 }, { "id": "temperature", "description": "temperature", "exercised": true, "case_count": 82 }, { "id": "plane_angle", "description": "plane_angle", "exercised": true, "case_count": 82 }, { "id": "angular_velocity", "description": "angular_velocity", "exercised": true, "case_count": 18 }, { "id": "mass", "description": "mass", "exercised": true, "case_count": 164 }, { "id": "duration", "description": "duration", "exercised": true, "case_count": 121 }, { "id": "frequency", "description": "frequency", "exercised": true, "case_count": 64 }, { "id": "speed", "description": "speed", "exercised": true, "case_count": 66 }, { "id": "acceleration", "description": "acceleration", "exercised": true, "case_count": 36 }, { "id": "area", "description": "area", "exercised": true, "case_count": 93 }, { "id": "volume", "description": "volume", "exercised": true, "case_count": 239 }, { "id": "section_modulus", "description": "section_modulus", "exercised": true, "case_count": 78 }, { "id": "area_moment", "description": "area_moment", "exercised": true, "case_count": 64 }, { "id": "force", "description": "force", "exercised": true, "case_count": 122 }, { "id": "pressure", "description": "pressure", "exercised": true, "case_count": 166 }, { "id": "energy", "description": "energy", "exercised": true, "case_count": 224 }, { "id": "torque", "description": "torque", "exercised": true, "case_count": 36 }, { "id": "power", "description": "power", "exercised": true, "case_count": 122 }, { "id": "electric_current", "description": "electric_current", "exercised": true, "case_count": 79 }, { "id": "electric_potential", "description": "electric_potential", "exercised": true, "case_count": 93 }, { "id": "electric_charge", "description": "electric_charge", "exercised": true, "case_count": 107 }, { "id": "resistance", "description": "resistance", "exercised": true, "case_count": 79 }, { "id": "capacitance", "description": "capacitance", "exercised": true, "case_count": 79 }, { "id": "inductance", "description": "inductance", "exercised": true, "case_count": 64 }, { "id": "magnetic_flux", "description": "magnetic_flux", "exercised": true, "case_count": 7 }, { "id": "magnetic_flux_density", "description": "magnetic_flux_density", "exercised": true, "case_count": 64 }, { "id": "electrical_conductance", "description": "electrical_conductance", "exercised": true, "case_count": 50 }, { "id": "electrical_resistivity", "description": "electrical_resistivity", "exercised": true, "case_count": 22 }, { "id": "electrical_conductivity", "description": "electrical_conductivity", "exercised": true, "case_count": 52 }, { "id": "apparent_power", "description": "apparent_power", "exercised": true, "case_count": 36 }, { "id": "reactive_power", "description": "reactive_power", "exercised": true, "case_count": 36 }, { "id": "voltage_temperature_coefficient", "description": "voltage_temperature_coefficient", "exercised": true, "case_count": 22 }, { "id": "transconductance_parameter", "description": "transconductance_parameter", "exercised": true, "case_count": 7 }, { "id": "resistance_per_length", "description": "resistance_per_length", "exercised": true, "case_count": 22 }, { "id": "amount_of_substance", "description": "amount_of_substance", "exercised": true, "case_count": 50 }, { "id": "volume_flow_rate", "description": "volume_flow_rate", "exercised": true, "case_count": 96 }, { "id": "mass_flow_rate", "description": "mass_flow_rate", "exercised": true, "case_count": 36 }, { "id": "mass_density", "description": "mass_density", "exercised": true, "case_count": 80 }, { "id": "mass_concentration", "description": "mass_concentration", "exercised": true, "case_count": 80 }, { "id": "amount_concentration", "description": "amount_concentration", "exercised": true, "case_count": 50 }, { "id": "molar_mass", "description": "molar_mass", "exercised": true, "case_count": 22 }, { "id": "dynamic_viscosity", "description": "dynamic_viscosity", "exercised": true, "case_count": 65 }, { "id": "kinematic_viscosity", "description": "kinematic_viscosity", "exercised": true, "case_count": 51 }, { "id": "surface_tension", "description": "surface_tension", "exercised": true, "case_count": 22 }, { "id": "thermal_conductivity", "description": "thermal_conductivity", "exercised": true, "case_count": 22 }, { "id": "heat_transfer_coefficient", "description": "heat_transfer_coefficient", "exercised": true, "case_count": 7 }, { "id": "thermal_resistance", "description": "thermal_resistance", "exercised": true, "case_count": 22 }, { "id": "specific_heat_capacity", "description": "specific_heat_capacity", "exercised": true, "case_count": 22 }, { "id": "heat_capacity", "description": "heat_capacity", "exercised": true, "case_count": 22 }, { "id": "specific_energy", "description": "specific_energy", "exercised": true, "case_count": 22 }, { "id": "temperature_coefficient", "description": "temperature_coefficient", "exercised": true, "case_count": 52 }, { "id": "momentum", "description": "momentum", "exercised": true, "case_count": 7 }, { "id": "areal_mass_density", "description": "areal_mass_density", "exercised": true, "case_count": 21 }, { "id": "solid_angle", "description": "solid_angle", "exercised": true, "case_count": 7 }, { "id": "ratio", "description": "ratio", "exercised": true, "case_count": 37 }, { "id": "luminous_intensity", "description": "luminous_intensity", "exercised": true, "case_count": 22 }, { "id": "luminous_flux", "description": "luminous_flux", "exercised": true, "case_count": 22 }, { "id": "illuminance", "description": "illuminance", "exercised": true, "case_count": 36 }, { "id": "irradiance", "description": "irradiance", "exercised": true, "case_count": 36 }, { "id": "luminance", "description": "luminance", "exercised": true, "case_count": 7 }, { "id": "luminous_efficacy", "description": "luminous_efficacy", "exercised": true, "case_count": 7 }, { "id": "radioactivity", "description": "radioactivity", "exercised": true, "case_count": 50 }, { "id": "absorbed_dose", "description": "absorbed_dose", "exercised": true, "case_count": 22 }, { "id": "dose_equivalent", "description": "dose_equivalent", "exercised": true, "case_count": 36 }, { "id": "catalytic_activity", "description": "catalytic_activity", "exercised": true, "case_count": 7 }, { "id": "inverse_time", "description": "inverse_time", "exercised": true, "case_count": 7 }, { "id": "information", "description": "information", "exercised": true, "case_count": 141 }, { "id": "information_rate", "description": "information_rate", "exercised": true, "case_count": 65 }, { "id": "numeric-boundary", "description": "rounding and range boundaries", "exercised": true, "case_count": 2791 }, { "id": "invalid-domain", "description": "ambiguous, incompatible or out-of-range inputs", "exercised": true, "case_count": 689 } ] }, "reference": { "items": [ { "class": "O1", "reference_scope": "model", "scope": "model", "label": "NIST conversion relations and the BIPM SI Brochure" }, { "class": "O1", "reference_scope": "model", "scope": "model", "label": "bipm: Tables 2, 4, 5, 7, 8; English printed pages 134-141" }, { "class": "O1", "reference_scope": "model", "scope": "model", "label": "nist-length: inch, mil (0.001 inch), yard, international mile" }, { "class": "O1", "reference_scope": "model", "scope": "model", "label": "nist-foot: Exact international foot and mile columns" }, { "class": "O1", "reference_scope": "model", "scope": "model", "label": "noaa-foot: U.S. survey foot equals 1200/3937 metre" }, { "class": "O1", "reference_scope": "model", "scope": "model", "label": "nist-temperature: Temperature Conversion (Exact), and absolute zero" }, { "class": "O1", "reference_scope": "model", "scope": "model", "label": "nist-rankine: degree Rankine, T/K = (T/degree R)/1.8" }, { "class": "O1", "reference_scope": "model", "scope": "model", "label": "sedris-gon: 1 gon = pi/200 rad, ISO 80000-3 item 3-5.e" }, { "class": "O1", "reference_scope": "model", "scope": "model", "label": "c1-bipm: Tables 2, 4, 5, 7, 8; Section 3 mass prefixes; fixed elapsed week = 7 Table-8 days" }, { "class": "O1", "reference_scope": "model", "scope": "model", "label": "c1-nist-mass: C-7/C-8 mass relations (16 oz/lb, 7000 gr/lb, 480 gr/oz t, 2000/2240 lb/ton, 14 lb/stone); C-17/C-19 exact kg factors" }, { "class": "O1", "reference_scope": "model", "scope": "model", "label": "c1-nist-foot: Exact international foot 0.3048 m and international mile 1609.344 m; divide by elapsed second/hour" }, { "class": "O1", "reference_scope": "model", "scope": "model", "label": "c1-gravity: VIM3 2.12, example 1: conventional standard acceleration of free fall 9.80665 m/s^2" }, { "class": "O1", 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