Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
pipe cap
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: structure-based → ⊑
Identity relative to genus Cap is given by a specific fitting relation (over/on the outside of a pipe end, not inside it) and application (pipes specifically), not a distinguishing function -- it performs the same ClosureFunction as any cap.
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
ClosureFunction → ClosureProcess ⊑ MaterialContainment
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COPI-Core operation
MaterialContainment via process parent MaterialContainment
LLM rationale:
Reused verbatim from the already-enriched genus 'cap' per the constructive-type rule.
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Expert review
2
Genus Proximus
✓ done
Cap · 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:
Both cross-source definitions (iso15926, posc_caesar) name PIPING COMPONENT / Artefact generically, but the concept is exactly a pipe-specific specialization of the already-enriched genus Cap ('a hood or covering for the top or end of something'), narrowed to pipe ends with a specific fitting relation.
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Expert review
3
Differentia Specifica
✓ done
∃bearerOf.ClosureFunction ⊓ ∃hasQuality.OverFitRelation
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Conditions that distinguish
Pipe Cap
from sibling classes under genus
Cap.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The 'fitting on or over (but not inside)' relation is the one additional condition beyond the genus's closure function, verbatim from both cross-source primary definitions; modeled as a quality since it describes a spatial fitting relation of the single cap body, not a separable 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 pipe cap from the genus Cap; the differentia is a fitting-relation quality (see Step 3).
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
∅ → ∅
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Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Same passive-closure signature as the genus Cap.
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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 Cap.
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.
