Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
drive shaft
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: function-based → ≡
The ISO 15926 definition focuses on the function of transferring rotational power from a prime driver to multiple machines, with the specific mechanism (belts and pulleys) being one implementation. The identity is given by the power transmission function, not by structural configuration.
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:
The function of transferring rotational power is what defines a drive shaft's identity. While the ISO definition mentions belts and pulleys as one implementation, the core function is power transmission through rotation. This function already exists in the ontology (used by gearbox), so I reuse it rather than creating a duplicate.
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Expert review
2
Genus Proximus
✓ done
Assembly
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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:
Drive shaft is a mechanical assembly with potentially removable components (shaft, pulleys, belt connections). While no specific parent like 'PowerTransmissionDevice' exists in the parent candidates, Assembly is appropriate as it represents a causally unified artifact with connected subcomponents. The single ISO source lists ARTEFACT and ENERGY TRANSFERRER as parents, but Assembly is the most specific ontologically correct superclass available.
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Expert review
3
Differentia Specifica
✓ done
∃bearerOf.PowerTransmissionFunction ⊓ ∃participatesIn.RotationalPowerTransferProcess
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Conditions that distinguish
Drive Shaft
from sibling classes under genus
Assembly.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The differentia captures both the power transmission function (shared with gearbox) and the specific rotational shaft-based mechanism. The process participation distinguishes it from other power transmission devices that use different mechanisms (hydraulic, electrical, belt-only systems).
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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:
No component terms are provided in the Known Component Terms list, and the ISO definition mentions belts and pulleys but these are not listed as available component classes. Without specific component terminology from the standards, no parts can be definitively modeled at this universal level.
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
∅ → ∅
▼
Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
The signature reflects the core function: taking mechanical power from one source and distributing it to multiple destinations. The one-to-many distribution pattern distinguishes drive shaft from simple couplings or single-machine power transmission devices.
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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
▼
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 Drive Shaft.
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.
