exported
necessary
angle valve
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Anglevalve
Generated on 2026-04-16
Natural Language Definition
EN
An angle valve is a valve that has valve ports which are not in-line but arranged at an angle to each other.
PT-BR
Uma válvula angular é uma válvula que tem portas da válvula que não estão alinhadas, mas dispostas em ângulo uma em relação à outra.
Formal Axioms
Semi-formal (Aristotelian)
Every angle valve is a valve that has a flow control function and has an angle valve body as a component part.
First-Order Logic Theory
Loading…
▸ Stored override
∀x (AngleValve(x) → (Valve(x) ∧ ∃f(FlowControlFunction(f) ∧ hasFunction(x,f)) ∧ ∃p(AngleValveBody(p) ∧ hasComponentPartAtAllTimes(x,p))))
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: AngleValve
<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_0000026 rdf:type owl:Class ; # FlowControlFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000520 # FlowControlProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000520 # FlowControlProcess
] ;
rdfs:label "flow control function"@en ;
rdfs:label "função de controle de fluxo"@pt-br .
### Process type
:COPI_0000520 rdf:type owl:Class ; # FlowControlProcess
rdfs:subClassOf :COPI_0000010 ; # FlowControl
rdfs:label "flow control process"@en ;
rdfs:label "processo de controle de fluxo"@pt-br .
:COPI_0000010 rdf:type owl:Class . # FlowControl
:COPI_0000520 # FlowControlProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] .
### Equipment universal: AngleValve
:COPI_0000093 rdf:type owl:Class ; # AngleValve
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_0000026 # FlowControlFunction
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasComponentPartAtAllTimes ;
owl:someValuesFrom :COPI_0000211 # AngleValveBody
] ;
rdfs:label "angle valve"@en ;
rdfs:label "válvula angular"@pt-br ;
iof-av:naturalLanguageDefinition "An angle valve is a valve that has valve ports which are not in-line but arranged at an angle to each other."@en ;
skos:definition "An angle valve is a valve that has valve ports which are not in-line but arranged at an angle to each other."@en ;
iof-av:naturalLanguageDefinition "Uma válvula angular é uma válvula que tem portas da válvula que não estão alinhadas, mas dispostas em ângulo uma em relação à outra."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every angle valve is a valve that has a flow control function and has an angle valve body as a component part."@en ;
iof-av:firstOrderLogicAxiom "∀x (AngleValve(x) → (Valve(x) ∧ ∃f(FlowControlFunction(f) ∧ hasFunction(x,f)) ∧ ∃p(AngleValveBody(p) ∧ hasComponentPartAtAllTimes(x,p))))"@en ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "Constructive type defined by geometric configuration. Under OWA, sufficient conditions for non-inline port arrangement could lead to false positives where complex multi-port manifolds or specialized valves with angular components get incorrectly classified as standard angle valves."@en ;
skos:definition "[ISO 15926-4] An <ANGLE VALVE> is an <ARTEFACT> and a <VALVE> that has valve ports which are not in-line"@en ;
skos:definition "[SLB Glossary] A variation of the globe valve in which the end connections are at right angles to each other, rather than being in line."@en .
:COPI_0000211 rdf:type owl:Class ; # AngleValveBody
rdfs:subClassOf iof-core:MaterialArtifact ;
rdfs:label "corpo de válvula angular"@pt-br ;
rdfs:label "angle valve body"@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
FlowControlFunction
⊑ DesignedFunction
Realized in
FlowControlProcess
⊑ FlowControl
Angle valves share the same identity-giving function as other valves - controlling fluid flow. The angle configuration is a structural differentia, not a functional one.
✓
Expert review — Accepted
2
Genus Determination
Valve
Valve is explicitly listed as a parent in the source hierarchies and is already enriched in our ontology. This is the most specific appropriate superclass - angle valve is clearly a subtype of valve distinguished by port geometry.
✓
Expert review — Accepted
3
Necessary Parts
| Part class | Parent | Relation |
|---|---|---|
| AngleValveBody | MaterialArtifact | hasComponentPartAtAllTimes |
The angle valve body with its non-inline port configuration is the essential distinguishing part. The flow control element is inherited from the valve genus.
✓
Expert review — Accepted
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— any phase
Outputs (O)
PortionOfFluid
— same composition, potentially modified pressure/flow rate
Transformation (T)
directional flow control with angular redirection
Same process signature as standard valves - single fluid input/output with flow control capability, but with angular flow redirection due to port geometry.
✓
Expert review — Accepted
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.
Constructive type defined by geometric configuration. Under OWA, sufficient conditions for non-inline port arrangement could lead to false positives where complex multi-port manifolds or specialized valves with angular components get incorrectly classified as standard angle valves.
✓
Expert review — Accepted
Cross-Standard Observations
ISO 15926 provides the generic definition focusing on non-inline ports, while SLB Glossary specifically relates it to globe valve variations with 90-degree connections. The subtypes show various angle specifications (45°, 60°, 90°) and connection types.
Source Definitions
2 sources
ISO 15926-4
ANGLE VALVE ↗
Definition text withheld (copyrighted standard) — follow the source link above.
SLB Glossary
angle valve ↗
Definition text withheld (copyrighted standard) — follow the source link above.
Metadata
| Ontology | COPI |
| Research group | INF-UFRGS-Ontologies |
| Funding | CNPq INF-UFRGS-ENERGIA |
| Project | OntoKG / Petrobras |
| ID | #157 |
| Cluster | angle valve |
| Status | exported |
| Axiom mode | necessary |
| Created | 2026-04-16 |
| Updated | 2026-09-09 |
ISA 5.1-2022 P&ID Symbol
wikimedia/valve.svg
