Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
level indicator
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: function-based → ≡
Identity is given by the DesignedFunction to indicate level locally - any sensing mechanism (float, displacer, sight glass, electronic) can realize this function. The differentia is purely functional: local level indication without remote signal transmission.
Validation status
Why primitive (necessary only)
Reviewer notes
FOL theory & disjointness
First-order logic theory (generated)
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Disjoint with
▸
Expert review
— accepted
Axiomatization steps
1
Identity-Giving Function
✓ done
LevelIndicationFunction → LevelIndicationProcess ⊑ MeasurementProcess
▼
COPI-Core operation
MeasurementProcess via process parent MeasurementProcess
LLM rationale:
The identity-giving function is to measure and locally display fluid or solid level - this distinguishes it from level transmitters (which provide remote signals) and other measurement instruments. This function already exists in the enriched ontology.
▸
Expert review
— accepted
2
Genus Proximus
✓ done
Indicator · 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:
Level indicator is a subtype of the general indicator class, which provides local display functionality. The enriched ontology already defines 'indicator' with IndicationFunction, making it the most specific appropriate superclass. No domain-specific parent candidates were provided, so this follows the natural hierarchy.
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Expert review
— accepted
3
Differentia Specifica
✓ done
∃hasFunction.LevelMeasurementFunction
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Conditions that distinguish
Level Indicator
from sibling classes under genus
Indicator.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The differentia is the specific measurement function - level measurement - combined with the inherited local indication capability from the genus. This distinguishes it from other indicators that measure different process variables.
▸
Expert review
— accepted
4
Necessary Parts
✓ done
no necessary parts
▼
Consider part-whole relations beyond subsumption:
hasComponentPartAtAllTimes (universal, structurally essential)
· hasComponentPartAtSomeTime (contingent, optional component)
LLM rationale:
These two parts are universally necessary - the sensing element performs the measurement and the local display presents the information locally, which are the two essential functions of any level indicator
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Expert review
— accepted
5
Process Participation Signature ⟨I, O, T⟩
✓ done
PortionOfFluid + PortionOfSolid → VisualIndication
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Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Level indicators measure either liquid or bulk solid level in containment and convert this to local visual indication for operator reading
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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 Level Indicator.
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.
