exported
equivalent
limit switch
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Limitswitch
Generated on 2026-04-13
Natural Language Definition
EN
A limit switch is an instrument that bears a position limit detection function, mechanically actuated by object motion to provide electrical switching signals when predetermined position limits are reached.
PT-BR
Um limit switch é um instrumento que possui uma função de detecção de limite de posição, acionado mecanicamente pelo movimento de objetos para fornecer sinais de chaveamento elétrico quando limites de posição predeterminados são atingidos.
Formal Axioms
Semi-formal (Aristotelian)
Every limit switch is an instrument that has the function to detect position limits and is mechanically operated by object motion to generate electrical switching signals.
First-Order Logic Theory
Loading…
▸ Stored override
∀x (LimitSwitch(x) ↔ Instrument(x) ∧ ∃f(PositionLimitDetectionFunction(f) ∧ bearerOf(x,f)) ∧ ∃p(MechanicalMotion(p) ∧ hasInput(x,p)) ∧ ∃s(InformationContentEntity(s) ∧ hasOutput(x,s)))
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: LimitSwitch
<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 "2026-10-07"^^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_0000183 rdf:type owl:Class ; # PositionLimitDetectionFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000601 # PositionLimitDetectionProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000601 # PositionLimitDetectionProcess
] ;
rdfs:label "position limit detection function"@en ;
rdfs:label "função de detecção de limite de posição"@pt-br .
### Process type
:COPI_0000601 rdf:type owl:Class ; # PositionLimitDetectionProcess
rdfs:subClassOf iof-core:MeasurementProcess ;
rdfs:label "position limit detection process"@en ;
rdfs:label "processo de detecção de limite de posição"@pt-br .
iof-core:MeasurementProcess rdf:type owl:Class .
:COPI_0000601 # PositionLimitDetectionProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom iof-core:InformationContentEntity
] .
### Equipment universal: LimitSwitch
:COPI_0000132 rdf:type owl:Class ; # LimitSwitch
owl:equivalentClass [
rdf:type owl:Class ;
owl:intersectionOf (
:COPI_0000091 # Instrument
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000183 # PositionLimitDetectionFunction
]
)
] ;
rdfs:label "limit switch"@en ;
rdfs:label "limit switch"@pt-br ;
iof-av:naturalLanguageDefinition "A limit switch is an instrument that bears a position limit detection function, mechanically actuated by object motion to provide electrical switching signals when predetermined position limits are reached."@en ;
skos:definition "A limit switch is an instrument that bears a position limit detection function, mechanically actuated by object motion to provide electrical switching signals when predetermined position limits are reached."@en ;
iof-av:naturalLanguageDefinition "Um limit switch é um instrumento que possui uma função de detecção de limite de posição, acionado mecanicamente pelo movimento de objetos para fornecer sinais de chaveamento elétrico quando limites de posição predeterminados são atingidos."@pt-br ;
skos:definition "[ISO 15926-4] A <LIMIT SWITCH> is an <INSTRUMENTATION ITEM> and a <POSITION SWITCH> that is a switch preventing the travel of an object in a mechanism past some predetermined point, mechanically operated by the motion of the object itself"@en ;
skos:definition "[POSC Caesar] A position switch having a positive opening operation."@en .
# Disjointness: LimitSwitch and FlowTransmitter
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000132 :COPI_0000118 ) . # LimitSwitch, FlowTransmitter
# Disjointness: LimitSwitch and TemperatureTransmitter
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000132 :COPI_0000155 ) . # LimitSwitch, TemperatureTransmitter
# Disjointness: LimitSwitch and PressureTransmitter
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000132 :COPI_0000144 ) . # LimitSwitch, PressureTransmitter
Axiomatization Decision Log
1
Identity-Giving Function
Function class
PositionLimitDetectionFunction
⊑ DesignedFunction
Realized in
PositionLimitDetectionProcess
⊑ MeasurementProcess
The identity-giving function is detecting when an object reaches a predetermined position limit and generating a switch signal. This combines position sensing with limit enforcement, distinguishing it from general position measurement instruments.
2
Genus Determination
Instrument
Among the parent candidates, 'INSTRUMENTATION ITEM' maps to 'Instrument' as the most specific appropriate genus. While 'POSITION SWITCH' is more specific, it appears to be a lateral classification rather than a genuine superclass. Limit switches are specialized measuring/control instruments, making Instrument the correct genus level.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
These parts represent the minimal functional architecture: actuation mechanism responds to position, switch contacts provide electrical output, housing provides protection and mounting.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
—
Outputs (O)
InformationContentEntity
— binary switching state
Transformation (T)
mechanical displacement transduction to electrical switching signal
Limit switches convert mechanical position information into discrete electrical signals, providing binary indication when position limits are reached.
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
Disjointness Axioms
FlowTransmitter
TemperatureTransmitter
PressureTransmitter
C?: FlowTransmitter [kind_ambiguous]. C?: TemperatureTransmitter [kind_ambiguous]. C?: PressureTransmitter [kind_ambiguous]. Different input parameter types (position vs. flow/temperature/pressure) and different output characteristics (binary switching vs. continuous measurement signal) create incompatible process signatures.
Cross-Standard Observations
ISO 15926 provides more detailed functional description including the mechanism of operation, while POSC Caesar focuses on the switching characteristics. Both emphasize the position-sensitive switching function, supporting the functional classification approach.
Source Definitions
2 sources
ISO 15926-4
LIMIT SWITCH ↗
Definition text withheld (copyrighted standard) — follow the source link above.
POSC Caesar
Limit Switch ↗
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 | #65 |
| Cluster | limit switch |
| Status | exported |
| Axiom mode | equivalent |
| Created | 2026-04-13 |
| Updated | 2026-09-08 |
ISA 5.1-2022 P&ID Symbol
5_1_1/002_located_in_field.png
