Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
master valve
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
▸
Expert review
Axiomatization steps
1
Identity-Giving Function
✓ done
PrimaryWellIsolationFunction → PrimaryWellIsolationProcess ⊑ FlowControl
▼
COPI-Core operation
FlowControl via process parent FlowControl
LLM rationale:
SLB and OnePetro both define the master valve by what it governs — all flow from the wellbore — not by its construction. The identity-giving function is primary isolation of the entire well stream, which is what distinguishes it from every other valve on the tree.
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Expert review
2
Genus Proximus
✓ done
Valve · 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 master valve is a valve; ISO 15926 VALVE is the nearest superclass already enriched in COPI (COPI_0000077).
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Expert review
3
Differentia Specifica
✓ done
∃bearerOf.PrimaryWellIsolationFunction ⊓ ∃componentPartOf.ChristmasTree
▼
Conditions that distinguish
Master Valve
from sibling classes under genus
Valve.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
Constructive subtype of Valve: the differentia combines a function with a positional condition (mounted on the tree, upstream of the wing valves). Position is not a sufficient condition, so the axiom is necessary-only.
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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:
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
FormationFluid → FormationFluid
▼
Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
The master valve is the primary shut-in point: its process either passes or isolates the whole well stream.
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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
no CFIHOS/DEXPI properties
▼
No CFIHOS/DEXPI properties found for this cluster.
Custom axioms
none
▼
Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Master Valve.
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.
Source Definitions (2)
master valve
Definition text hidden (copyrighted standard) — sign in to view, or follow the source link above.
Master valve
Definition text hidden (copyrighted standard) — sign in to view, or follow the source link above.
Provenance tiers (2)
Sources the pipeline cited while building this entry. Verbatim = the quote was copied word-for-word from that source; summary = paraphrased.
OWL/Turtle preview
Download .ttl
Numeric
COPI_* IRIs from copi-iri-map.tsv, with the readable name as a trailing comment. Names not yet in the map stay readable.
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ID 1024 · claude-opus-5
Created 2026-08-08 21:02
Updated 2026-09-08 12:26
