Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
seat
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: structure-based → ⊑
The 'seat' is primarily defined by its physical configuration as 'that part of a valve against which the closure element affects tight shutoff'. Its identity is given by its structural role as a bearing surface, not by a unique function independent of the valve it belongs to. The seat enables the valve's function but has no autonomous function beyond providing a sealing interface.
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
SealingFunction → SealingProcess
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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 seat's identity-giving function is sealing - it provides the critical interface that enables tight shutoff when the closure element contacts it. This is the generic sealing function shared by all valve seats.
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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 domain-specific superclass exists in the already-enriched classes. A seat is a discrete valve component that is a designed artifact but not a complex assembly with removable subcomponents. It falls directly under MaterialArtifact as a causally unified object designed for a specific function.
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Expert review
3
Differentia Specifica
✓ done
∃hasComponentPartAtAllTimes.SealingSurface ⊓ ∃participatesIn.ValveClosingProcess
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Conditions that distinguish
Seat
from sibling classes under genus
MaterialArtifact.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The differentia captures the seat's unique structural role as a bearing surface in valve operation. The sealing surface is the essential structural component, and participation in valve closing processes distinguishes it from other sealing components.
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Expert review
4
Necessary Parts
✓ done
None
▼
Consider part-whole relations beyond subsumption:
hasComponentPartAtAllTimes (universal, structurally essential)
· hasComponentPartAtSomeTime (contingent, optional component)
LLM rationale:
The sealing surface is the only universally necessary part of any valve seat. Other components like gaskets or inserts are subtype-specific variations. No terms in the provided list match the basic sealing surface concept.
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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:
The seat enables the valve's primary sealing function by providing the interface against which the closure element bears. Input is fluid that would otherwise pass through; output is the same fluid stream blocked by the seat-closure element interface.
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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 Seat.
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.
