Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
limit switch
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: function-based → ≡
The concept is defined by its functional purpose - preventing travel past predetermined points and detecting position states - rather than by a specific physical mechanism. Different mechanisms (mechanical, magnetic, optical) can realize the same limit switch 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
PositionLimitDetectionFunction → PositionLimitDetectionProcess ⊑ MeasurementProcess
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COPI-Core operation
MeasurementProcess via process parent MeasurementProcess
LLM rationale:
The identity-giving function is detecting when an object reaches a predetermined position limit and generating a switch signal. This combines position sensing with limit enforcement, distinguishing it from general position measurement instruments.
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Expert review
2
Genus Proximus
✓ done
Instrument · 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:
Among the parent candidates, 'INSTRUMENTATION ITEM' maps to 'Instrument' as the most specific appropriate genus. While 'POSITION SWITCH' is more specific, it appears to be a lateral classification rather than a genuine superclass. Limit switches are specialized measuring/control instruments, making Instrument the correct genus level.
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Expert review
3
Differentia Specifica
✓ done
∃bearerOf.PositionLimitDetectionFunction ⊓ ∃hasInput.MechanicalMotion ⊓ ∃hasOutput.InformationContentEntity
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Conditions that distinguish
Limit Switch
from sibling classes under genus
Instrument.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The differentia specifies the unique position limit detection function that distinguishes limit switches from other instruments. The input-output signature (mechanical motion → electrical signal) and the limit-based switching behavior are essential distinguishing characteristics.
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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 represent the minimal functional architecture: actuation mechanism responds to position, switch contacts provide electrical output, housing provides protection and mounting.
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
∅ → InformationContentEntity
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Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Limit switches convert mechanical position information into discrete electrical signals, providing binary indication when position limits are reached.
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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 Limit Switch.
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
▼
Click "Detect divergences" to analyse cross-standard disagreements for this cluster.
Source Definitions (2)
LIMIT SWITCH — ClassOfInanimatePhysicalObject
Definition text hidden (copyrighted standard) — sign in to view, or follow the source link above.
Limit Switch — Class
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Provenance tiers (2)
Sources the pipeline cited while building this entry. Verbatim = the quote was copied word-for-word from that source; summary = paraphrased.
Linked competency questions
- answered What is the designed function of a limit switch?
- open What is a switch contact?
- open Is a switch contact a necessary component of every limit switch?
OWL/Turtle preview
Download .ttl
Numeric
COPI_* IRIs from copi-iri-map.tsv, with the readable name as a trailing comment. Names not yet in the map stay readable.
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ID 65 · claude-sonnet-4-20250514
Created 2026-04-13 23:41
Updated 2026-09-08 12:26
