Definition preview
Unit Directory
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16 definitions · 5 quantity kinds · 0.1.0-preview.1
16 units shown
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SI reference unit for length.
- Quantity kind
- Length
- SI dimension
L- Allowed roles
- Scalar
Scope and distinctions
Definition metadata only; use an existing converter where linked.
Available operations
These links open existing tools under their own contracts. They have not been migrated to the new unit registry.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
Definition and registry versions
- Definition revision
- 0.1.0
- Registry snapshot
- 0.1.0-preview.1 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
ae7547f6f908b9490c51286c6f15382209104f097a9da76865691c9a1e67337a- Definition dependency digest
332208870c32953eec705d89aabd042eb61d4b2d244e75bc2bb6852a4ccc7a87
Digests identify definition content; they are not CVP evidence or production attestations.
- Quantity kind
- Length
- SI dimension
L- Allowed roles
- Scalar
Scope and distinctions
Definition metadata only; use an existing converter where linked.
Available operations
These links open existing tools under their own contracts. They have not been migrated to the new unit registry.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
Definition and registry versions
- Definition revision
- 0.1.0
- Registry snapshot
- 0.1.0-preview.1 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
990a2075ce20aa061ede26751327120d515839dc72701dc4bd53703d8a54a0e5- Definition dependency digest
fc7e57576897d87d1b0d58b268f36af5b9735313982b584a9d613f514070ade2
Digests identify definition content; they are not CVP evidence or production attestations.
- Quantity kind
- Length
- SI dimension
L- Allowed roles
- Scalar
Scope and distinctions
Definition metadata only; use an existing converter where linked.
Available operations
These links open existing tools under their own contracts. They have not been migrated to the new unit registry.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
Definition and registry versions
- Definition revision
- 0.1.0
- Registry snapshot
- 0.1.0-preview.1 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
db94c734dba37e366d3e1b013962a8e50daf70c2dac87c76db37e56e40b83f53- Definition dependency digest
c69f362cee8afad91e744c2ee14df3d528601ac04dfcbfda5be1ca5e337b5528
Digests identify definition content; they are not CVP evidence or production attestations.
- Quantity kind
- Length
- SI dimension
L- Allowed roles
- Scalar
Scope and distinctions
International foot only. The historical U.S. survey foot is a different definition; an unqualified ambiguous foot must not be silently resolved.
Available operations
These links open existing tools under their own contracts. They have not been migrated to the new unit registry.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
Definition and registry versions
- Definition revision
- 0.1.0
- Registry snapshot
- 0.1.0-preview.1 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
9a566084c51b26adc9506f08a99584cb07ee488c42fca94cf59a2e71b6c87c35- Definition dependency digest
ff89eb1f5b31cc70c4a648f421b42ad5a7069c83270a257b8a49909b7d4f5bf5
Digests identify definition content; they are not CVP evidence or production attestations.
- Quantity kind
- Length
- SI dimension
L- Allowed roles
- Scalar
Scope and distinctions
International inch; historical or regional definitions are not inferred.
Available operations
These links open existing tools under their own contracts. They have not been migrated to the new unit registry.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
Definition sources
- NIST — NIST Guide to the SI, Appendix B.8
SP 811 online conversion table accessed 2026-10-28
Appendix B.8, I: inch to metre (exact factor)
Source checked: Exact definition is distinguished from rounded table entries; no media copied.
Definition and registry versions
- Definition revision
- 0.1.0
- Registry snapshot
- 0.1.0-preview.1 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
a16b4776069b2bc8257865ae053a4a7c79eb360494b4020e60b3b4132d887490- Definition dependency digest
0684ce09adaef939cc45746b9fb45b80e8e2904ecd650d6095532bb9733e7f8f
Digests identify definition content; they are not CVP evidence or production attestations.
SI reference unit for mass.
- Quantity kind
- Mass
- SI dimension
M- Allowed roles
- Scalar
Scope and distinctions
Definition metadata only; use an existing converter where linked.
Available operations
These links open existing tools under their own contracts. They have not been migrated to the new unit registry.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
Definition and registry versions
- Definition revision
- 0.1.0
- Registry snapshot
- 0.1.0-preview.1 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
dfc025543c3d8de33d838065f3b9edb65ec6c193a489a4dd3257e7a41c0ad3e0- Definition dependency digest
5d3a225c5ee04dc0291f10cc08cd2d9972e4d9ac6a7d40137f29370fd6db04dd
Digests identify definition content; they are not CVP evidence or production attestations.
- Quantity kind
- Mass
- SI dimension
M- Allowed roles
- Scalar
Scope and distinctions
Definition metadata only; use an existing converter where linked.
Available operations
These links open existing tools under their own contracts. They have not been migrated to the new unit registry.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
Definition sources
- BIPM — The International System of Units (SI)
9th edition, version 4.01, June 2026
Section 3: mass prefixes are applied to gram, not kilogram
Source checked: Definition metadata attributed to BIPM; brochure licensed CC BY 4.0.
Definition and registry versions
- Definition revision
- 0.1.0
- Registry snapshot
- 0.1.0-preview.1 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
adcf17ca5c5765dcdafe50e6fe96f696f7f03f6dfce2cb85f4364a58b360fcdf- Definition dependency digest
8e5392d262e870833c8c85e08d11b5a08d9e67ea9dc72b763865ee8aeb6cee92
Digests identify definition content; they are not CVP evidence or production attestations.
SI reference unit for time interval.
- Quantity kind
- Time interval
- SI dimension
T- Allowed roles
- Scalar
Scope and distinctions
Elapsed time, not calendar dates, time zones or leap-second conversion.
Available operations
No converter is linked for this definition yet. You can inspect the definition and its sources.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
Definition and registry versions
- Definition revision
- 0.1.0
- Registry snapshot
- 0.1.0-preview.1 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
8aa6ecb730440fb8277eccabeaa5962a739b496df7d5b41b3a3711244fa0acc1- Definition dependency digest
657db99564a96416f6a339adf9c6214d63c116582eaec341347bb8a9b3e20edb
Digests identify definition content; they are not CVP evidence or production attestations.
- Quantity kind
- Time interval
- SI dimension
T- Allowed roles
- Scalar
Scope and distinctions
Exactly 60 seconds of elapsed time; not an angular minute.
Available operations
No converter is linked for this definition yet. You can inspect the definition and its sources.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
Definition and registry versions
- Definition revision
- 0.1.0
- Registry snapshot
- 0.1.0-preview.1 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
a1f27cb0c7216e71c4c234128ccfc7123c99460e065a95c20c2583c85df062f3- Definition dependency digest
2371066f080c4943dd6f0bc88d1e5d2dcd64abc646dc416590b48236c1afd22b
Digests identify definition content; they are not CVP evidence or production attestations.
- Quantity kind
- Time interval
- SI dimension
T- Allowed roles
- Scalar
Scope and distinctions
Exactly 3600 seconds of elapsed time; not civil-time or calendar arithmetic.
Available operations
No converter is linked for this definition yet. You can inspect the definition and its sources.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
Definition and registry versions
- Definition revision
- 0.1.0
- Registry snapshot
- 0.1.0-preview.1 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
4502c64d56d83add7b22ebe569b85d459c798ae635a506011e1918c004810f27- Definition dependency digest
53984e44b40608e6795cd945372e512e790968337de93b03100e6c397abbfeca
Digests identify definition content; they are not CVP evidence or production attestations.
Temperature values: value in K = 1 × value in K + 0.
Temperature differences: value in K = 1 × value in K; no offset.
- Quantity kind
- Temperature
- SI dimension
Θ- Allowed roles
- Temperature value (point) / Temperature difference (interval)
Scope and distinctions
Point and interval roles are distinct. Ordinary thermodynamic temperature points must not be below absolute zero.
Available operations
These links open existing tools under their own contracts. They have not been migrated to the new unit registry.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
Definition and registry versions
- Definition revision
- 0.1.0
- Registry snapshot
- 0.1.0-preview.1 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
78455b65b8e243fea6678ec8800a918358aa6457d0b2dc91183dcf6d1e867db5- Definition dependency digest
c7aeea745a867d7de7548575b8797317c7c88e75d099d48369cfa42bed162045
Digests identify definition content; they are not CVP evidence or production attestations.
Temperature values: value in K = 1 × value in °C + 273.15.
Temperature differences: value in K = 1 × value in °C; no offset.
- Quantity kind
- Temperature
- SI dimension
Θ- Allowed roles
- Temperature value (point) / Temperature difference (interval)
Scope and distinctions
Temperature points use the offset. Temperature differences use slope only. Linked legacy tools handle points, not intervals.
Available operations
These links open existing tools under their own contracts. They have not been migrated to the new unit registry.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
Definition sources
- NIST — SI Units — Temperature
Web conversion table accessed 2026-10-28
Temperature Conversion (Exact), Celsius to Kelvin; interval explanation
Source checked: References the exact temperature conversion table and interval relationship; no media copied.
Definition and registry versions
- Definition revision
- 0.1.0
- Registry snapshot
- 0.1.0-preview.1 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
f0bc8761f66c51a4c73891be9e32aa6878452a43bf41f63c91d4c323a8ed7ca5- Definition dependency digest
f407142ab49655347ac79403fe02e2e06386a7aed712471516c2801dae1b6ab1
Digests identify definition content; they are not CVP evidence or production attestations.
Temperature values: value in K = 5/9 × value in °F + 45967/180.
Temperature differences: value in K = 5/9 × value in °F; no offset.
- Quantity kind
- Temperature
- SI dimension
Θ- Allowed roles
- Temperature value (point) / Temperature difference (interval)
Scope and distinctions
Temperature points use scale and offset. Differences use only 5/9; the linked legacy converter handles points.
Available operations
These links open existing tools under their own contracts. They have not been migrated to the new unit registry.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
Definition sources
- NIST — SI Units — Temperature
Web conversion table accessed 2026-10-28
Temperature Conversion (Exact), Fahrenheit to Kelvin; interval explanation
Source checked: References the exact temperature conversion table and interval relationship; no media copied.
Definition and registry versions
- Definition revision
- 0.1.0
- Registry snapshot
- 0.1.0-preview.1 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
0ce6c1ca5b59199e31a45aba86c322ede2d9d5068f303d08443c75a35f34195f- Definition dependency digest
0debb50984e564c8246b2391fa973feb04df17266a13fe2ceb77ff8680599741
Digests identify definition content; they are not CVP evidence or production attestations.
- Quantity kind
- Volume
- SI dimension
L^3- Allowed roles
- Scalar
Scope and distinctions
Definition metadata only; use an existing converter where linked.
Available operations
No converter is linked for this definition yet. You can inspect the definition and its sources.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
Definition sources
- BIPM — The International System of Units (SI)
9th edition, version 4.01, June 2026
Section 2.3.4, Table 4: coherent derived unit for volume
Source checked: Definition metadata attributed to BIPM; brochure licensed CC BY 4.0.
Definition and registry versions
- Definition revision
- 0.1.0
- Registry snapshot
- 0.1.0-preview.1 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
0bf402a08ad78206bfeffd0abebbf493b8021199f4d2a21f5182568fdd1fbbba- Definition dependency digest
7bd640effdaf67cebde1fe6a2c5308180d27c7eb8f60346934affdc8bdd568e8
Digests identify definition content; they are not CVP evidence or production attestations.
- Quantity kind
- Volume
- SI dimension
L^3- Allowed roles
- Scalar
Scope and distinctions
Volume expression. Mass-to-volume conversion needs a separate density model.
Available operations
No converter is linked for this definition yet. You can inspect the definition and its sources.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
Definition and registry versions
- Definition revision
- 0.1.0
- Registry snapshot
- 0.1.0-preview.1 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
cf8a08c00c61468ee42d19f46dad285c7ec4e1e426419ee23abffc94ce3d64c9- Definition dependency digest
b6042b6f9269cc1382fbdf5097c42bdc1146659ccd658e16c1b717bd4456b678
Digests identify definition content; they are not CVP evidence or production attestations.
- Quantity kind
- Volume
- SI dimension
L^3- Allowed roles
- Scalar
Scope and distinctions
Volume expression derived from litre using the milli prefix; no density or substance is inferred.
Available operations
No converter is linked for this definition yet. You can inspect the definition and its sources.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
Definition sources
- BIPM — The International System of Units (SI)
9th edition, version 4.01, June 2026
Section 3, Table 7: milli prefix; Section 4, Table 8: litre
Source checked: Definition metadata attributed to BIPM; brochure licensed CC BY 4.0.
Definition and registry versions
- Definition revision
- 0.1.0
- Registry snapshot
- 0.1.0-preview.1 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
e4754662071e7679644dad95f932313e8ddb7d470cd57fba7d426656c85cead6- Definition dependency digest
13aac3d4345b9a7505629e25a440642d52d16ef3eceaa2253e60c50be53de46f
Digests identify definition content; they are not CVP evidence or production attestations.
These definitions are available for inspection. They do not certify a conversion or an engineering model.
