Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
flow meter
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: function-based → ≡
Flow meters are primarily defined by their function to measure flow rate and produce corresponding signals or indications, regardless of their underlying measurement principle (Coriolis, ultrasonic, differential pressure, etc.). The physical mechanism varies widely across subtypes but the core function remains constant.
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
FlowMeasurementFunction → FlowMeasurementProcess
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COPI-Core operation
⚠ Process parent
PlannedProcess reaches no COPI-Core operation, and no gap (out of scope / coverage gap) is recorded.
LLM rationale:
The identity-giving function is to measure flow rate and produce signals or indications representing the measured flow. This distinguishes flow meters from other instruments that measure different process variables.
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Expert review
2
Genus Proximus
✓ done
Instrument · 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:
Flow meters are measuring instruments - they detect, measure and indicate or transmit process variables. The parent candidates 'instrument equipment' and 'Instrumentation And Control Equipment' point to the general category of instruments. While 'Instrument' is not explicitly in the parent candidates list, it is the obvious domain superclass for measuring devices and appears as genus for several already-enriched instrument types (flow indicator, limit switch, transmitter).
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Expert review
3
Differentia Specifica
✓ done
∃bearerOf.FlowMeasurementFunction
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Conditions that distinguish
Flow Meter
from sibling classes under genus
Instrument.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The differentia is specifically the flow measurement function, which distinguishes flow meters from other instruments that measure different process variables. This is the minimal condition beyond the general instrument genus.
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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 are the minimal essential components - a sensing element to detect flow and signal processing to produce the measurement output. Specific sensing mechanisms vary by subtype.
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
PortionOfFluid → PortionOfFluid + MeasurementInformationContentEntity
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Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Flow meters are non-intrusive measurement devices - fluid passes through essentially unchanged while flow information is extracted and converted to a measurement signal
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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 Flow Meter.
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.
