Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
flange
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: structure-based → ⊑
Flange identity is defined by its physical geometry and structural configuration - a projecting flat rim, plate, collar, or rib - rather than by any specific function it performs. While flanges serve a connection function, their identity comes from their characteristic structural form.
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
ConnectionFunction → ConnectionProcess
▼
COPI-Core operation
⚠ Process parent
PlannedProcess reaches no COPI-Core operation, and no gap (out of scope / coverage gap) is recorded.
LLM rationale:
Flanges are designed to connect components together, providing a means of assembling and disassembling piping and equipment. This is the generic function that all flanges share, regardless of their specific structural configuration.
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Expert review
2
Genus Proximus
✓ done
Coupling · MaterialArtifact
▼
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:
A flange is a coupling: it is a material artifact bearing a ConnectionFunction, which is exactly the definition of Coupling. The subsumption was already entailed but never declared (ODR-022 §17); the projecting rim/plate/collar geometry is the differentia over that genus.
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Expert review
3
Differentia Specifica
✓ done
∃hasCharacteristic.ProjectingFlatRimGeometry ⊓ ∃bearerOf.ConnectionFunction
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Conditions that distinguish
Flange
from sibling classes under genus
Coupling.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The projecting flat rim geometry is the defining structural characteristic mentioned across all definitions. The mechanical connection function specializes the generic connection function to emphasize the structural, bolted connection capability that flanges provide.
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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 parts capture the essential structural elements that enable a flange to function - the body provides the geometry and the bolt holes enable the mechanical connection capability.
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
MaterialArtifact → MaterialArtifact
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Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Flanges take two separate components and create a mechanically joined assembly through their bolted connection mechanism. The transformation is purely mechanical - no change in material properties or phase.
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Expert review
More
Alternative labels
none
▼
Synonyms / alternative labels (comma-separated) — skos:altLabel
Language auto-detected on export (PT if the label contains accents, EN otherwise).
Properties as BFO qualities
0 of 4 selected
▼
Select which CFIHOS/DEXPI properties inhere in every instance of Flange as
bfo:Quality subclasses.
Each selected property →
:FlangeQuality ⊑ bfo:Quality, inheres in :Flange
Custom axioms
none
▼
Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Flange.
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
▼
Click "Detect divergences" to analyse cross-standard disagreements for this cluster.
