Core Ontology for Petroleum Installations · INF-UFRGS-Ontologies · CNPq INF-UFRGS-ENERGIA inf.ufrgs.br/ontologies/copi dee69df
ISA 5.1 symbol for master valve
exported necessary
master valve
IRI: http://www.inf.ufrgs.br/ontologies/copi#Mastervalve
Generated on 2026-08-08
Natural Language Definition
EN
A valve that bears a primary well isolation function and is a component of a christmas tree, controlling all flow from the wellbore.
PT-BR
Uma válvula que possui uma função de isolamento primário do poço e é um componente de uma árvore de natal, controlando todo o fluxo do poço.
Formal Axioms
First-Order Logic Theory
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OWL 2 / Turtle
@prefix copi: <https://www.inf.ufrgs.br/ontologies/copi/> . @prefix : <https://www.inf.ufrgs.br/ontologies/copi/> . @prefix owl: <http://www.w3.org/2002/07/owl#> . @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . @prefix xsd: <http://www.w3.org/2001/XMLSchema#> . @prefix bfo: <http://purl.obolibrary.org/obo/> . @prefix iof-core: <https://spec.industrialontologies.org/ontology/construct/> . @prefix iof-av: <https://spec.industrialontologies.org/ontology/annotation/> . @prefix skos: <http://www.w3.org/2004/02/skos/core#> . @prefix qudt: <http://qudt.org/schema/qudt/> . @prefix dcterms: <http://purl.org/dc/terms/> . @prefix foaf: <http://xmlns.com/foaf/0.1/> . @prefix apv: <http://inf.ufrgs.br/ontologies/apv#> . ### COPI — Core Ontology for Petroleum Installations ### Class module: MasterValve <https://www.inf.ufrgs.br/ontologies/copi> rdf:type owl:Ontology ; dcterms:title "Core Ontology for Petroleum Installations (COPI)"@en ; dcterms:title "Ontologia Core para Instalações de Petróleo (COPI)"@pt-br ; dcterms:description "BFO/IOF-Core conformant ontology of equipment classes for petroleum production plants, developed using the five-step RDL enrichment method."@en ; skos:scopeNote "Material artifacts (bfo:material_entity) that (i) are part of a petroleum production plant, and (ii) bear at least one function whose realization involves the transport (e.g. production and injection), processing (separation and other processes), control, monitoring, measurement, containment or offloading of material or energy."@en ; skos:scopeNote "Artefatos materiais (bfo:material_entity) que (i) fazem parte de uma planta de produção de petróleo, e (ii) possuem ao menos uma função cuja realização envolve o transporte (p. ex. produção e injeção), processamento (separação e outros processos), controle, monitoramento, medição, contenção ou escoamento de material ou energia."@pt-br ; skos:scopeNote "COPI provides high-level equipment categories defined by function to demonstrate the defined-class mechanism. Equipment subtypes are annotated with references to CFIHOS and PCA RDL terms. COPI is not a reference data library; organizations should use CFIHOS, PCA RDL, or ISO 14224 for comprehensive equipment classification."@en ; skos:scopeNote "COPI fornece categorias de alto nível de equipamentos definidas por função para demonstrar o mecanismo de classe definida. Os subtipos de equipamentos são anotados com referências aos termos do CFIHOS e do PCA RDL. COPI não é uma biblioteca de dados de referência; organizações devem utilizar o CFIHOS, o PCA RDL ou a ISO 14224 para classificação abrangente de equipamentos."@pt-br ; owl:versionInfo "1.1.0" ; owl:imports <https://spec.industrialontologies.org/ontology/core/Core/> ; owl:imports <http://purl.obolibrary.org/obo/bfo/2020/bfo.owl> ; dcterms:creator "Nicolau Oyhenard dos Santos"@en ; dcterms:contributor "Cauã Antunes" ; dcterms:contributor "Haroldo Rojas" ; dcterms:contributor "Rafael Petry" ; dcterms:contributor "Régis Romeu" ; dcterms:contributor "Mara Abel" ; dcterms:isPartOf <https://inf.ufrgs.br/projetos/OntoKG> ; dcterms:publisher "Universidade Federal do Rio Grande do Sul (UFRGS)"@en ; dcterms:license <https://creativecommons.org/licenses/by/4.0/> ; dcterms:created "2026-04-08"^^xsd:date ; dcterms:modified "2026-10-08"^^xsd:date ; apv:GlobalMinLanguageCoverage "en pt-br" ; apv:ClassURIFormationRule "https://www[.]inf[.]ufrgs[.]br/ontologies/copi/(COPI_[0-9]{7}|[A-Z][A-Za-z0-9]*)" ; apv:ClassMinAnnotationCoverage "rdfs:label https://spec.industrialontologies.org/ontology/annotation/naturalLanguageDefinition" . iof-av:naturalLanguageDefinition rdf:type owl:AnnotationProperty ; apv:MinAnnotationLength 20 . ### Identity-giving function :COPI_0000710 rdf:type owl:Class ; # PrimaryWellIsolationFunction rdfs:subClassOf iof-core:DesignedFunction ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:allValuesFrom :COPI_0000711 # PrimaryWellIsolationProcess ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:someValuesFrom :COPI_0000711 # PrimaryWellIsolationProcess ] ; rdfs:label "primary well isolation function"@en . ### Process type :COPI_0000711 rdf:type owl:Class ; # PrimaryWellIsolationProcess rdfs:subClassOf :COPI_0000010 ; # FlowControl rdfs:label "primary well isolation process"@en . :COPI_0000010 rdf:type owl:Class . # FlowControl :COPI_0000711 # PrimaryWellIsolationProcess rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasInput ; owl:someValuesFrom :COPI_0000390 # FormationFluid ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasSpecifiedOutput ; owl:someValuesFrom :COPI_0000390 # FormationFluid ] . ### Equipment universal: MasterValve :COPI_0000728 rdf:type owl:Class ; # MasterValve rdfs:subClassOf :COPI_0000077 ; # Valve rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart) owl:someValuesFrom :COPI_0000710 # PrimaryWellIsolationFunction ] ; rdfs:label "master valve"@en ; rdfs:label "válvula mestra"@pt-br ; iof-av:naturalLanguageDefinition "A valve that bears a primary well isolation function and is a component of a christmas tree, controlling all flow from the wellbore."@en ; skos:definition "A valve that bears a primary well isolation function and is a component of a christmas tree, controlling all flow from the wellbore."@en ; iof-av:naturalLanguageDefinition "Uma válvula que possui uma função de isolamento primário do poço e é um componente de uma árvore de natal, controlando todo o fluxo do poço."@pt-br ; iof-av:isPrimitive "true"^^xsd:boolean ; iof-av:primitiveRationale "The definition is partly positional ('on the christmas tree', 'main shut-in valve on the well'); under OWA a positional differentia cannot be sufficient."@en ; skos:definition "[SLB Glossary] A valve located on the Christmas tree that controls all flow from the wellbore."@en ; skos:definition "[OnePetro] The main shut-in valve on the well."@en .
Axiomatization Decision Log
1 Identity-Giving Function
Function class
PrimaryWellIsolationFunction ⊑ DesignedFunction
Realized in
PrimaryWellIsolationProcess ⊑ FlowControl
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.
2 Genus Determination
Valve
A master valve is a valve; ISO 15926 VALVE is the nearest superclass already enriched in COPI (COPI_0000077).
3 Necessary Parts

No necessary parts recorded (concept may be primitive at this level).

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).
4 Process Participation Signature ⟨I, O, T⟩
Inputs (I)
FormationFluid — full wellbore stream upstream of any branch
Outputs (O)
FormationFluid — wellbore stream permitted downstream, or fully isolated
Transformation (T)
permitting or blocking the entire produced stream from the wellbore
The master valve is the primary shut-in point: its process either passes or isolates the whole well stream.
5 Axiom Mode Decision

Necessary conditions only — modelled as a primitive universal (⊑, SubClassOf). Identity is grounded in designed function and cannot be reduced to a property checklist.

The definition is partly positional ('on the christmas tree', 'main shut-in valve on the well'); under OWA a positional differentia cannot be sufficient.
Reviewer Notes
ODR-022 §O6: standard-term component of 'christmas tree'. Admitted to the pipeline because it is a term in a source standard AND that standard states it is a component of that equipment (verbatim source_quote in the owning entry). Awaiting expert review.

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