Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
sheave
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: structure-based → ⊑
A sheave is defined primarily by its physical structure: a grooved wheel designed for belt/rope/wire interfaces. While it has a mechanical function (power transmission, load lifting), its identity is given by the distinctive grooved wheel geometry rather than a specific process function.
Validation status
Why primitive (necessary only)
Reviewer notes
FOL theory & disjointness
First-order logic theory (generated)
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Disjoint with
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Expert review
Axiomatization steps
1
Identity-Giving Function
✓ done
⚠ not anchored
PowerTransmissionFunction → PowerTransmissionProcess
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COPI-Core operation
⚠ Process parent
PlannedProcess reaches no COPI-Core operation, and no gap (out of scope / coverage gap) is recorded.
LLM rationale:
A sheave is designed to transmit mechanical power through belt/rope/wire systems by changing direction of force or providing mechanical advantage. This aligns with existing PowerTransmissionFunction used for gearbox.
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Expert review
2
Genus Proximus
✓ done
MaterialArtifact
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Genus (genus proximum)
Most specific superclass — may be a domain class like "Valve" or an IOF-Core root.
BFO/IOF-Core Root
bfo:Object branch
bfo:ObjectAggregate branch
bfo:ImmaterialEntity branch
LLM rationale:
No specific 'Wheel' or 'Pulley' class exists in the enriched ontology. The parent candidates include WHEEL and ARTEFACT from ISO 15926, but these are not yet enriched. A sheave is a single causally unified mechanical component without removable subparts requiring assembly-level maintenance, making MaterialArtifact the appropriate BFO root.
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Expert review
3
Differentia Specifica
✓ done
∃hasComponentPartAtAllTimes.GroovedRim ⊓ ∃bearerOf.PowerTransmissionFunction
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Conditions that distinguish
Sheave
from sibling classes under genus
MaterialArtifact.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The grooved rim is the essential structural differentia that distinguishes a sheave from other rotating mechanical elements. The groove geometry is specifically engineered for belt/rope/wire interfaces, which is what makes it a sheave rather than a plain wheel or other rotating component.
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Expert review
4
Necessary Parts
✓ done
no necessary parts
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Consider part-whole relations beyond subsumption:
hasComponentPartAtAllTimes (universal, structurally essential)
· hasComponentPartAtSomeTime (contingent, optional component)
LLM rationale:
These two parts are essential to all sheaves: the grooved rim provides the functional interface, and the hub enables mounting and rotation.
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
∅ → ∅
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Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
A sheave transforms the direction and potentially the magnitude of mechanical forces transmitted through flexible elements like belts, ropes, or wires.
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Expert review
More
Alternative labels
none
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Synonyms / alternative labels (comma-separated) — skos:altLabel
Language auto-detected on export (PT if the label contains accents, EN otherwise).
Properties as BFO qualities
no CFIHOS/DEXPI properties
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No CFIHOS/DEXPI properties found for this cluster.
Custom axioms
none
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Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Sheave.
Write the restriction block in Turtle syntax (without the leading
rdfs:subClassOf).
Example: [ owl:onProperty :hasPart ; owl:someValuesFrom :Wellhead ]
Cross-standard divergences
none detected yet
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Click "Detect divergences" to analyse cross-standard disagreements for this cluster.
