Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
drill bit
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
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
RockCuttingFunction → RockCuttingProcess
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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:
All three sources define the drill bit purely by what it does to rock — 'used to create cylindrical holes', 'rock cutting device', 'tool used to crush or cut rock'. None constrains its construction, so the function is identity-giving and sufficient.
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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:
ISO 15926 types it as a CUTTING TOOL, which COPI does not declare; MaterialArtifact is the nearest available superclass.
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Expert review
3
Differentia Specifica
✓ done
∃bearerOf.RockCuttingFunction
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Conditions that distinguish
Drill Bit
from sibling classes under genus
MaterialArtifact.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
Purely functional basis — the three source definitions agree on function and say nothing about construction, so equivalence is safe and lets the reasoner classify bit subtypes automatically.
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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 sub-component is named in any source definition for this term. validate_necessary_parts_quotes() requires a verbatim source_quote for every part, and there is nothing to quote — so no parts are asserted (ODR-022 §10.2).
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
PortionOfSolid → RockCuttings
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Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Input is intact formation rock, output is cuttings; the transformation is the defining act of the bit.
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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 Drill Bit.
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.
