exported
equivalent
transducer
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Transducer
Generated on 2026-04-16
Natural Language Definition
EN
A transducer is an instrument that bears a TransductionFunction to convert information from one form or magnitude of energy to another form or magnitude.
PT-BR
Um transdutor é um instrumento que possui uma FunçãoDeTransdução para converter informação de uma forma ou magnitude de energia para outra forma ou magnitude.
Formal Axioms
Semi-formal (Aristotelian)
Every transducer is an instrument that has the designed function to convert energy or signal forms while preserving information content.
First-Order Logic Theory
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▸ Stored override
∀x (Transducer(x) ↔ Instrument(x) ∧ ∃f (TransductionFunction(f) ∧ bearerOf(x,f)))
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: Transducer
<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_0000672 rdf:type owl:Class ; # TransductionFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000673 # TransductionProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000673 # TransductionProcess
] ;
rdfs:label "transduction function"@en ;
rdfs:label "função de transdução"@pt-br .
### Process type
:COPI_0000673 rdf:type owl:Class ; # TransductionProcess
rdfs:subClassOf iof-core:MeasurementProcess ;
rdfs:label "transduction process"@en ;
rdfs:label "processo de transdução"@pt-br .
iof-core:MeasurementProcess rdf:type owl:Class .
:COPI_0000673 # TransductionProcess
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: Transducer
:COPI_0000362 rdf:type owl:Class ; # Transducer
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_0000672 # TransductionFunction
]
)
] ;
rdfs:label "transducer"@en ;
rdfs:label "transdutor"@pt-br ;
iof-av:naturalLanguageDefinition "A transducer is an instrument that bears a TransductionFunction to convert information from one form or magnitude of energy to another form or magnitude."@en ;
skos:definition "A transducer is an instrument that bears a TransductionFunction to convert information from one form or magnitude of energy to another form or magnitude."@en ;
iof-av:naturalLanguageDefinition "Um transdutor é um instrumento que possui uma FunçãoDeTransdução para converter informação de uma forma ou magnitude de energia para outra forma ou magnitude."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every transducer is an instrument that has the designed function to convert energy or signal forms while preserving information content."@en ;
iof-av:firstOrderLogicAxiom "∀x (Transducer(x) ↔ Instrument(x) ∧ ∃f (TransductionFunction(f) ∧ bearerOf(x,f)))"@en ;
skos:definition "[ISO 15926-4] A <TRANSDUCER> is an <ENERGY CONVERTER> that is capable of converting a <PROCESS VARIABLE> in one form or magnitude of energy to another form or magnitude of the same energy"@en ;
skos:definition "[ISA 5.1] a general term for a device, which can be a primary element, transmitter, relay, converter or other device, that receives information in the form of one or more physical quantities, modifies the information or its form, or both if required, and produces a resultant output signal."@en ;
skos:definition "[POSC Caesar] An artefact that accepts information in the form of a physical or chemical variable (its input variable) and converts it into an output variable of the same or another nature, according to a definite law."@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
TransductionFunction
⊑ DesignedFunction
Realized in
TransductionProcess
⊑ MeasurementProcess
The identity-giving function is the capability to convert information or energy from one form or magnitude to another. This conversion/transduction is what makes a transducer a transducer, distinct from simple measurement (which only detects) or transmission (which only conveys).
2
Genus Determination
Instrument
Transducers are fundamentally instrumentation devices that process information signals. While ISO 15926 suggests 'ENERGY CONVERTER' as parent, transducers are more specifically instruments that handle process variables and signals. The existing enriched classes show many instrument subtypes (transmitter, indicator, detector) suggesting Instrument as the appropriate genus level.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
These two parts are fundamental to all transducers - something to sense the input variable and something to convert it to the output form. Specific transducer types will have more specialized parts.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
MeasurementInformationContentEntity
— any physical or chemical quantity
Outputs (O)
InformationContentEntity
— converted form of input variable according to definite law
Transformation (T)
energy form conversion while preserving information content
Transducers accept physical/chemical variables as inputs and produce output signals in different energy forms, with the transformation governed by a definite conversion relationship.
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
Cross-Standard Observations
All three standards agree on the core conversion concept but use slightly different terminology - 'energy converter' (ISO), 'device that receives and modifies information' (ISA), 'accepts and converts variables' (POSC). The functional essence is consistent across sources.
