Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
densitometer
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 identity-giving function of measuring density across all definitions. While specific implementations may vary (photographic vs. fluid density measurement), the core identity is the density measurement function regardless of physical mechanism.
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
DensityMeasurementFunction → DensityMeasurementProcess ⊑ MeasurementProcess
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COPI-Core operation
MeasurementProcess via process parent MeasurementProcess
LLM rationale:
All three definitions consistently identify density measurement as the core purpose. This is what makes a densitometer a densitometer rather than any other measuring instrument.
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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:
From the parent_candidates, 'MEASURING INSTRUMENT' is most specific. Since 'Instrument' (without 'measuring') appears in the enriched classes as the genus for controllers, detectors, indicators, etc., and measuring is a subset of instrument functionality, 'Instrument' is the appropriate genus. This follows the pattern of other measuring devices in the enriched list.
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Expert review
3
Differentia Specifica
✓ done
∃bearerOf.DensityMeasurementFunction
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Conditions that distinguish
Densitometer
from sibling classes under genus
Instrument.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The density measurement function is the minimal differentiating condition that distinguishes densitometers from all other instruments. This is both necessary (all densitometers must measure density) and sufficient (any instrument that measures density is by definition a densitometer).
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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:
These are the minimal universal parts - every densitometer needs a sensing mechanism and output capability. Specific sensor types (photoelectric cell, gamma detector) are subtype-specific.
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
PortionOfFluid → InformationContentEntity
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Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Densitometers transform physical density information into measurable/transmittable data. The input is any material whose density needs measurement, output is density information.
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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
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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 Densitometer.
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.
