exported
equivalent
transmitter
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Transmitter
Generated on 2026-04-09
Natural Language Definition
EN
A transmitter is an instrument that bears a signal transmission function, receiving process variable signals from sensors and converting them into standardized output signals for transmission to control systems.
PT-BR
Um transmissor é um instrumento que possui uma função de transmissão de sinal, recebendo sinais de variáveis de processo de sensores e convertendo-os em sinais de saída padronizados para transmissão a sistemas de controle.
Formal Axioms
Semi-formal (Aristotelian)
Every transmitter is an instrument that has the function of signal transmission and has a sensor element and signal conditioner and transmission module and receives process variable inputs and produces standardized signal outputs.
First-Order Logic Theory
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▸ Stored override
∀x(Transmitter(x) ↔ Instrument(x) ∧ ∃f(SignalTransmissionFunction(f) ∧ bearerOf(x,f)) ∧ ∃s(SensorElement(s) ∧ hasComponentPartAtAllTimes(x,s)) ∧ ∃c(SignalConditioner(c) ∧ hasComponentPartAtAllTimes(x,c)) ∧ ∃t(TransmissionModule(t) ∧ hasComponentPartAtAllTimes(x,t)))
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: Transmitter
<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_0000030 rdf:type owl:Class ; # SignalTransmissionFunction
rdfs:subClassOf :COPI_0000029 ; # InstrumentationFunction
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000035 # SignalTransmissionProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000035 # SignalTransmissionProcess
] ;
rdfs:label "signal transmission function"@en ;
rdfs:label "função de transmissão de sinal"@pt-br .
:COPI_0000029 rdf:type owl:Class . # InstrumentationFunction
### Process type
:COPI_0000035 rdf:type owl:Class ; # SignalTransmissionProcess
rdfs:subClassOf iof-core:MeasurementProcess ;
rdfs:label "signal transmission process"@en ;
rdfs:label "processo de transmissão de sinal"@pt-br .
iof-core:MeasurementProcess rdf:type owl:Class .
:COPI_0000035 # SignalTransmissionProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom iof-core:MeasurementInformationContentEntity
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom iof-core:InformationContentEntity
] .
### Equipment universal: Transmitter
:COPI_0000157 rdf:type owl:Class ; # Transmitter
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_0000030 # SignalTransmissionFunction
]
)
] ;
rdfs:label "transmitter"@en ;
rdfs:label "transmissor"@pt-br ;
iof-av:naturalLanguageDefinition "A transmitter is an instrument that bears a signal transmission function, receiving process variable signals from sensors and converting them into standardized output signals for transmission to control systems."@en ;
skos:definition "A transmitter is an instrument that bears a signal transmission function, receiving process variable signals from sensors and converting them into standardized output signals for transmission to control systems."@en ;
iof-av:naturalLanguageDefinition "Um transmissor é um instrumento que possui uma função de transmissão de sinal, recebendo sinais de variáveis de processo de sensores e convertendo-os em sinais de saída padronizados para transmissão a sistemas de controle."@pt-br ;
rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000196 ; owl:someValuesFrom :COPI_0000058 ] ;
skos:definition "[ISO 15926-4] A <TRANSMITTER> is a <FunctionalObject> that is capable of <TRANSMITTING>"@en ;
skos:definition "[CFIHOS] A physical object that is an element that receives a process variable signal from a sensor and converts it into an output signal."@en ;
skos:definition "[DEXPI] A detecting instrument that generates a process variable signal and converts it into an output signal."@en ;
skos:definition "[ISA 5.1] a device that senses a process variable through the medium of a sensor or measuring element and has an output whose steady-state value varies only as a predetermined function of the process variable."@en ;
skos:definition "[POSC Caesar] A 'detecting instrument' that generates a process variable signal and converts it into an output signal."@en .
# Disjointness: Transmitter and Actuator
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000157 :COPI_0000207 ) . # Transmitter, Actuator
Axiomatization Decision Log
1
Identity-Giving Function
Function class
SignalTransmissionFunction
⊑ InstrumentationFunction
Realized in
SignalTransmissionProcess
⊑ MeasurementProcess
All definitions consistently emphasize the core identity-giving function: receiving process variable signals and converting/transmitting them as standardized output signals. This signal transduction function is what makes a transmitter a transmitter regardless of the measured variable or sensing mechanism.
✓
Expert review — Accepted
2
Genus Determination
Instrument
While parent candidates include 'instrument equipment' and 'Instrumentation And Control Equipment', transmitters are clearly a subtype of instruments - devices that measure, indicate, or control process variables. They are causally unified material artifacts designed for measurement and signal processing. The genus 'Instrument' is more specific than MaterialArtifact but not yet enriched in our ontology.
✓
Expert review — Accepted
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
These three components represent the essential functional architecture of any transmitter: sensing, signal conditioning, and transmission. Specific sensor types vary by subtype but the basic architecture is universal.
✓
Expert review — Accepted
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
MeasurementInformationContentEntity
— measurable physical quantity
Outputs (O)
InformationContentEntity
— 4-20mA, digital protocol, or pneumatic
Transformation (T)
process variable signal transduction and conditioning
Transmitters consistently transform physical process variables into standardized electrical, pneumatic, or digital signals suitable for transmission to control systems, displays, or data acquisition systems.
✓
Expert review — Accepted
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
✓
Expert review — Accepted
Disjointness Axioms
Actuator
C4: Actuator. Transmitters are sensing/measurement devices with signal outputs, while actuators and final control elements receive control signals and perform physical actions on the process. Their process signatures are fundamentally incompatible.
Cross-Standard Observations
Strong consistency across sources on the core signal transmission function. CFIHOS and ISA 5.1 provide the most technical detail about standardized outputs and predetermined functional relationships. Some sources (DEXPI, POSC Caesar) conflate transmitters with 'detecting instruments' more broadly, but all agree on the signal conversion and output aspects.
Source Definitions
5 sources
ISO 15926-4
TRANSMITTER ↗
Definition text withheld (copyrighted standard) — follow the source link above.
CFIHOS
transmitter
Definition text withheld (copyrighted standard) — follow the source link above.
DEXPI
Transmitter ↗
Definition text withheld (copyrighted standard) — follow the source link above.
isa5_1
transmitter ↗
Definition text withheld (copyrighted standard) — follow the source link above.
POSC Caesar
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 | #9 |
| Cluster | transmitter |
| Status | exported |
| Axiom mode | equivalent |
| Created | 2026-04-09 |
| Updated | 2026-09-08 |
ISA 5.1-2022 P&ID Symbol
5_2_1/001_transmitter_with_integral_primary_element_bubble_format.png
