Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
hydraulic actuator
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: structure-based → ⊑
While actuators are functionally defined by their ActuationFunction, 'hydraulic actuator' specifically designates actuators operated by hydraulic power rather than electric, pneumatic, or manual means. The hydraulic operation principle is a constructive differentia - a specific mechanism/power source that distinguishes it from other actuator types.
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
ActuationFunction → ActuationProcess
▼
COPI-Core operation
⚠ Process parent
PlannedProcess reaches no COPI-Core operation, and no gap (out of scope / coverage gap) is recorded.
LLM rationale:
Reusing the identity-giving function from the already-enriched 'actuator' class. All actuators, regardless of power source, share the fundamental function of converting control signals into mechanical motion.
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Expert review
2
Genus Proximus
✓ done
Actuator · 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:
The parent_candidates include 'actuator' which is already enriched in our ontology with ActuationFunction and Assembly genus. This is the most specific and appropriate superclass - hydraulic actuator is clearly a subtype of actuator differentiated by power source.
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Expert review
3
Differentia Specifica
✓ done
∃participatesIn.HydraulicToMechanicalEnergyConversionProcess
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Conditions that distinguish
Hydraulic Actuator
from sibling classes under genus
Actuator.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The hydraulic power source is the key distinguishing feature. This requires hydraulic fluid input and participation in hydraulic-to-mechanical energy conversion, which are constructive characteristics not shared by other actuator types.
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Expert review
4
Necessary Parts
✓ done
no necessary parts
▼
Consider part-whole relations beyond subsumption:
hasComponentPartAtAllTimes (universal, structurally essential)
· hasComponentPartAtSomeTime (contingent, optional component)
LLM rationale:
These parts are universal to hydraulic actuators regardless of specific configuration (linear/rotary) and are necessary for hydraulic operation.
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
HydraulicFluid + ControlSignal → HydraulicFluid
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Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Signature reflects the core hydraulic actuation process: pressurized hydraulic fluid input plus control signal produces mechanical motion output plus return fluid.
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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
0 of 4 selected
▼
Select which CFIHOS/DEXPI properties inhere in every instance of Hydraulic Actuator as
bfo:Quality subclasses.
Each selected property →
:HydraulicActuatorQuality ⊑ bfo:Quality, inheres in :HydraulicActuator
Custom axioms
none
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Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Hydraulic Actuator.
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.
