Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
pipe reducer concentric
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: structure-based → ⊑
Identity relative to genus PipeReducer is given by geometric symmetry (a coaxial, cone-shaped taper), not a distinguishing function -- it performs the same FluidConductionFunction as any pipe reducer.
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
FluidConductionFunction → FluidConductionProcess ⊑ MomentumTransfer
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COPI-Core operation
MomentumTransfer via process parent MomentumTransfer
LLM rationale:
Reused verbatim from the already-enriched genus 'pipe reducer' per the constructive-type rule.
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Expert review
2
Genus Proximus
✓ done
PipeReducer · 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:
'pipe reducer' (already enriched, genus=Pipe, differentia references InletEnd/OutletEnd/DifferentNominalPipeSizes) is the exact genus proximum: a concentric reducer is a pipe reducer distinguished only by the symmetry of its taper.
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Expert review
3
Differentia Specifica
✓ done
∃hasQuality.CoaxialCenterline
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Conditions that distinguish
Pipe Reducer Concentric
from sibling classes under genus
PipeReducer.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
Directly grounded verbatim: 'A PIPE REDUCER CONCENTRIC is a PIPE REDUCER where the center lines of the two ends are in line.' Modeled as a quality (following the 'riser' precedent, ∃hasQuality.VerticalOrientation) rather than a component part, since it is a geometric property of the single reducer body, not a separable/addable part.
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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:
No separable component distinguishes a concentric reducer from the genus; the distinguishing trait is a geometric quality of the body itself (see Step 3).
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
PortionOfFluid → PortionOfFluid
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Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Same passive-transport signature as the genus PipeReducer; the coaxial symmetry affects velocity-profile uniformity but not the ontological transformation category.
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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 Pipe Reducer Concentric.
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.
