Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
cap
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: function-based → ≡
Both cross-source definitions (iso15926, cfihos) are purpose-based ('a hood or covering for the top or end of something'), naming no specific mechanism, material, or application -- any artefact meeting this generic covering purpose qualifies.
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:
No already-enriched function is co-extensional: this is a generic covering/protective purpose, broader than any existing function (e.g. ContainmentFunction implies holding a substance inside a bounded volume; a cap merely covers an end/top, which may or may not be pressure- or fluid-bearing). New, independent function per the Reuse vs. Creation Policy.
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Expert review
2
Genus Proximus
✓ done
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:
No more specific enriched domain superclass fits a generic 'hood or covering for the top or end of something' that is not itself pipe-, valve-, or vessel-specific; MaterialArtifact (the IOF-Core root) is used directly, matching the pattern for other root-level generic artefacts (e.g. gasket, seat, spacer).
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Expert review
3
Differentia Specifica
✓ done
∃bearerOf.ClosureFunction
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Conditions that distinguish
Cap
from sibling classes under genus
MaterialArtifact.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
Functional type: the identity-giving function alone is necessary and sufficient; this is a root-level generic concept with no enriched siblings yet to compare against.
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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 structural component is named in either cross-source definition; the concept is defined purely by its covering purpose.
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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:
Passive covering role, matching the 'containment' canonical term's description of passive enclosure devices.
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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 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.
