exported
equivalent
position transmitter
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Positiontransmitter
Generated on 2026-04-13
Natural Language Definition
EN
A position transmitter is a transmitter that measures position or displacement and converts it to a standardized output signal.
PT-BR
Um transmissor de posição é um transmissor que mede posição ou deslocamento e o converte em um sinal de saída padronizado.
Formal Axioms
Semi-formal (Aristotelian)
Every position transmitter is a transmitter that has the function of position transmission and receives position or displacement signals as input.
First-Order Logic Theory
Loading…
▸ Stored override
∀x(PositionTransmitter(x) ↔ Transmitter(x) ∧ ∃f(PositionTransmissionFunction(f) ∧ bearerOf(x,f)) ∧ ∃s(PositionMeasurementResult(s) ∧ hasInput(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: PositionTransmitter
<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_0000603 rdf:type owl:Class ; # PositionTransmissionFunction
rdfs:subClassOf :COPI_0000030 ; # SignalTransmissionFunction
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000602 # PositionMeasurementAndTransmissionProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000602 # PositionMeasurementAndTransmissionProcess
] ;
rdfs:label "position transmission function"@en ;
rdfs:label "função de transmissão de posição"@pt-br .
:COPI_0000030 rdf:type owl:Class . # SignalTransmissionFunction
### Process type
:COPI_0000602 rdf:type owl:Class ; # PositionMeasurementAndTransmissionProcess
rdfs:subClassOf iof-core:MeasurementProcess ;
rdfs:label "position measurement and transmission process"@en ;
rdfs:label "processo de medição e transmissão de posição"@pt-br .
iof-core:MeasurementProcess rdf:type owl:Class .
:COPI_0000602 # PositionMeasurementAndTransmissionProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000402 # PositionMeasurementResult
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom iof-core:InformationContentEntity
] .
### Equipment universal: PositionTransmitter
:COPI_0000330 rdf:type owl:Class ; # PositionTransmitter
owl:equivalentClass [
rdf:type owl:Class ;
owl:intersectionOf (
:COPI_0000157 # Transmitter
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000603 # PositionTransmissionFunction
]
)
] ;
rdfs:label "position transmitter"@en ;
rdfs:label "transmissor de posição"@pt-br ;
iof-av:naturalLanguageDefinition "A position transmitter is a transmitter that measures position or displacement and converts it to a standardized output signal."@en ;
skos:definition "A position transmitter is a transmitter that measures position or displacement and converts it to a standardized output signal."@en ;
iof-av:naturalLanguageDefinition "Um transmissor de posição é um transmissor que mede posição ou deslocamento e o converte em um sinal de saída padronizado."@pt-br ;
rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000196 ; owl:someValuesFrom :COPI_0000058 ] ;
skos:definition "[ISO 15926-4] A <POSITION TRANSMITTER>is a <PROCESS VARIABLE TRANSMITTER> and a <POSITION MEASURING INSTRUMENT>"@en ;
skos:definition "[CFIHOS] A transmitter that is producing a standardized output signal dependent of a received input signal from a position detector."@en ;
skos:definition "[ISA 5.1] ISA 5.1 tag abbreviation 'ZT'. First letter 'Z': Position, Dimension. Succeeding letters: 'T' = Transmit."@en .
# Disjointness: PositionTransmitter and TemperatureTransmitter
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000330 :COPI_0000155 ) . # PositionTransmitter, TemperatureTransmitter
# Disjointness: PositionTransmitter and PressureTransmitter
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000330 :COPI_0000144 ) . # PositionTransmitter, PressureTransmitter
# Disjointness: PositionTransmitter and FlowTransmitter
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000330 :COPI_0000118 ) . # PositionTransmitter, FlowTransmitter
# Disjointness: PositionTransmitter and LevelTransmitter
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000330 :COPI_0000131 ) . # PositionTransmitter, LevelTransmitter
Axiomatization Decision Log
1
Identity-Giving Function
Function class
PositionTransmissionFunction
⊑ SignalTransmissionFunction
Realized in
PositionMeasurementAndTransmissionProcess
⊑ MeasurementProcess
The identity-giving function is to measure position/displacement and convert it to a standardized signal for transmission. This is a specialized subtype of SignalTransmissionFunction that specifically deals with position variables.
2
Genus Determination
Transmitter
From parent_candidates, 'transmitter' is the most specific and appropriate genus, already enriched in our ontology with SignalTransmissionFunction. PROCESS VARIABLE TRANSMITTER would be more specific but is not yet in our system. Position transmitter is clearly a subtype of transmitter that specializes in position measurement.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
These are the essential components any position transmitter must have: a position-sensing element, signal processing electronics, and protective housing.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PositionMeasurementResult
— mechanical displacement or position information
Outputs (O)
InformationContentEntity
— 4-20mA, digital, or other standard format proportional to position
Transformation (T)
signal transduction from mechanical position to standardized electrical/digital signal
Position transmitters transduce mechanical position information into standardized signals for process control systems, requiring power input and producing calibrated output signals.
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
Disjointness Axioms
TemperatureTransmitter
PressureTransmitter
FlowTransmitter
LevelTransmitter
C2: TemperatureTransmitter, PressureTransmitter, FlowTransmitter, LevelTransmitter. Different transmitter types have incompatible measurement signatures - a single instrument cannot simultaneously measure position and temperature/pressure/flow as its primary function
Cross-Standard Observations
ISO 15926 provides the most comprehensive definition showing inheritance from both PROCESS VARIABLE TRANSMITTER and POSITION MEASURING INSTRUMENT. CFIHOS focuses on the signal conversion aspect. ISA 5.1 provides the standard tag designation 'ZT' for position transmitters.
Source Definitions
3 sources
ISO 15926-4
POSITION TRANSMITTER ↗
Definition text withheld (copyrighted standard) — follow the source link above.
CFIHOS
position transmitter
Definition text withheld (copyrighted standard) — follow the source link above.
isa5_1
Position Transmitter ↗
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 | #51 |
| Cluster | position transmitter |
| Status | exported |
| Axiom mode | equivalent |
| Created | 2026-04-13 |
| Updated | 2026-09-08 |
ISA 5.1-2022 P&ID Symbol
5_2_1/001_transmitter_with_integral_primary_element_bubble_format.png
