Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
drill string
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
DrillingPowerTransmissionFunction → DrillingPowerTransmissionProcess
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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:
SLB gives the purpose directly: the combination of drillpipe, BHA and other tools 'used to make the drill bit turn at the bottom of the wellbore'. The identity-giving function is transmitting rotation and weight from surface to the bit.
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Expert review
2
Genus Proximus
✓ done
Assembly
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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:
All three sources describe an assembly or combination of parts — ISO 'an assembly of drill pipe with attached tool joints', OnePetro 'all the equipment in a drilling BHA plus the drill pipe'. iof-core:Assembly is the correct root.
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Expert review
3
Differentia Specifica
✓ done
∃bearerOf.DrillingPowerTransmissionFunction ⊓ ∃hasComponentPartAtAllTimes.DrillPipe ⊓ ∃hasComponentPartAtAllTimes.BottomHoleAssembly
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Conditions that distinguish
Drill String
from sibling classes under genus
Assembly.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
Constructive basis: every source enumerates the constituents (drill pipe, tool joints, BHA). Necessary-only — an enumeration of parts is not a sufficient condition under OWA.
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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:
Parts named in the differentia are not asserted as necessary_parts: validate_necessary_parts_quotes() requires each part to carry a verbatim source_quote, and these come from the definition of this entry itself rather than from a standard stating a component relationship. Left empty pending expert review.
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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:
No admissible participants: what the string transmits is mechanical power, which under ODR-010 §5.1 is not a material entity and therefore not a process participant. The load is a quality (bearer_of MechanicalLoad, COPI_0000385) on the artifact.
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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 String.
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.
