Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
level switch
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: function-based → ≡
Identity is determined by the designed function to provide switching signals based on level detection, regardless of the specific sensing mechanism (float, capacitive, ultrasonic, etc.)
Validation status
Why primitive (necessary only)
Reviewer notes
FOL theory & disjointness
First-order logic theory (generated)
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Disjoint with
▸
Expert review
Axiomatization steps
1
Identity-Giving Function
✓ done
LevelSwitchingFunction → LevelSwitchingProcess ⊑ MeasurementProcess
▼
COPI-Core operation
MeasurementProcess via process parent MeasurementProcess
LLM rationale:
The identity-giving function is to provide discrete on/off switching signals when fluid or particulate material levels reach preset values. This combines level sensing with switching actuation.
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Expert review
2
Genus Proximus
✓ done
Instrument · Assembly
▼
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:
From parent_candidates, INSTRUMENTATION ITEM and LEVEL MEASURING INSTRUMENT point to instrumentation hierarchy. 'Instrument' is the most specific appropriate superclass for measurement and control devices. Control switch is too narrow as it excludes the measurement aspect. Not enriched yet in our ontology.
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Expert review
3
Differentia Specifica
✓ done
∃bearerOf.LevelSwitchingFunction ⊓ ∃participatesIn.LevelSwitchingProcess
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Conditions that distinguish
Level 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 requires both level detection and switching capabilities with discrete output signals, distinguishing it from continuous measurement instruments and from switches that detect other process variables.
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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:
All level switches require sensing, switching, and output components regardless of the specific detection principle used.
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
PortionOfFluid → InformationContentEntity
▼
Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Transforms physical level information into discrete electrical switching signals for control system use.
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Expert review
More
Alternative labels
none
▼
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 13 selected
▼
Select which CFIHOS/DEXPI properties inhere in every instance of Level Switch as
bfo:Quality subclasses.
Each selected property →
:LevelSwitchQuality ⊑ bfo:Quality, inheres in :LevelSwitch
Custom axioms
none
▼
Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Level 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 (3)
LEVEL SWITCH — ClassOfFunctionalObject
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cfihos V2.0
level switch — TagAndEquipmentClass
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Level Switch — Class
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Provenance tiers (3)
Sources the pipeline cited while building this entry. Verbatim = the quote was copied word-for-word from that source; summary = paraphrased.
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 217 · claude-sonnet-4-20250514
Created 2026-04-16 18:12
Updated 2026-09-08 12:26
