Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
spacer
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: function-based → ≡
The concept is primarily defined by its spacing function - maintaining predefined distances between objects or separating fluids. While there are constructive subtypes (pipe flange spacer, shaft spacer), the core identity is functional.
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
SpacingFunction → SpacingProcess
▼
COPI-Core operation
⚠ Process parent
PlannedProcess reaches no COPI-Core operation, and no gap (out of scope / coverage gap) is recorded.
LLM rationale:
The identity-giving function is maintaining spatial separation or distance between objects/fluids. All definitions converge on this spacing capability as the essential characteristic.
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Expert review
2
Genus Proximus
✓ done
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:
No appropriate domain-specific superclass exists in the parent candidates. Spacers are causally unified artifacts designed to realize a spacing function, making MaterialArtifact the most appropriate genus. They are typically single maintainable units rather than assemblies with removable subcomponents.
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Expert review
3
Differentia Specifica
✓ done
∃bearerOf.SpacingFunction
▼
Conditions that distinguish
Spacer
from sibling classes under genus
MaterialArtifact.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The SpacingFunction is the minimal differentia that distinguishes spacers from all other MaterialArtifacts. This covers both physical spacing (maintaining distance) and fluid separation applications.
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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:
Spacers are typically simple artifacts without universal mandatory subcomponents. Part requirements vary significantly by subtype (shaft spacers, pipe flange spacers, coupling spacers each have different structural requirements).
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
PhysicalObject → PhysicalObject
▼
Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Spacers maintain spatial relationships between multiple objects without transforming the objects themselves. For fluid spacer applications, they separate incompatible fluids during operations.
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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
0 of 1 selected
▼
Select which CFIHOS/DEXPI properties inhere in every instance of Spacer as
bfo:Quality subclasses.
Each selected property →
:SpacerQuality ⊑ bfo:Quality, inheres in :Spacer
Custom axioms
none
▼
Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Spacer.
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.
