exported
necessary
header
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Header
Generated on 2026-04-16
Natural Language Definition
EN
A header is a manifold that connects to many smaller pipes for collecting discharge from multiple sources or distributing fluid to multiple destinations.
PT-BR
Um header é um manifold que se conecta a muitos tubos menores para coletar descarga de múltiplas fontes ou distribuir fluido para múltiplos destinos.
Formal Axioms
Semi-formal (Aristotelian)
Header ≡ manifold ⊓ ∃connects_to.SmallPipe ⊓ ∃participatesIn.MultiStreamDistributionProcess
First-Order Logic Theory
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▸ Stored override
∀x(Header(x) ↔ (manifold(x) ∧ ∃y(SmallPipe(y) ∧ connects_to(x,y)) ∧ ∃z(MultiStreamDistributionProcess(z) ∧ participatesIn(x,z))))
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: Header
<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_0000533 rdf:type owl:Class ; # FluidDistributionFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000534 # FluidDistributionProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000534 # FluidDistributionProcess
] ;
rdfs:label "fluid distribution function"@en ;
rdfs:label "função de distribuição de fluido"@pt-br .
### Process type
:COPI_0000534 rdf:type owl:Class ; # FluidDistributionProcess
rdfs:subClassOf :COPI_0000003 ; # MomentumTransfer
rdfs:label "fluid distribution process"@en ;
rdfs:label "processo de distribuição de fluido"@pt-br .
:COPI_0000003 rdf:type owl:Class . # MomentumTransfer
:COPI_0000534 # FluidDistributionProcess
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: Header
:COPI_0000293 rdf:type owl:Class ; # Header
rdfs:subClassOf :COPI_0000311 ; # Manifold
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000533 # FluidDistributionFunction
] ;
rdfs:label "header"@en ;
rdfs:label "header"@pt-br ;
iof-av:naturalLanguageDefinition "A header is a manifold that connects to many smaller pipes for collecting discharge from multiple sources or distributing fluid to multiple destinations."@en ;
skos:definition "A header is a manifold that connects to many smaller pipes for collecting discharge from multiple sources or distributing fluid to multiple destinations."@en ;
iof-av:naturalLanguageDefinition "Um header é um manifold que se conecta a muitos tubos menores para coletar descarga de múltiplas fontes ou distribuir fluido para múltiplos destinos."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Header ≡ manifold ⊓ ∃connects_to.SmallPipe ⊓ ∃participatesIn.MultiStreamDistributionProcess"@en ;
iof-av:firstOrderLogicAxiom "∀x(Header(x) ↔ (manifold(x) ∧ ∃y(SmallPipe(y) ∧ connects_to(x,y)) ∧ ∃z(MultiStreamDistributionProcess(z) ∧ participatesIn(x,z))))"@en ;
iof-av:isPrimitive "true"^^xsd:boolean ;
skos:definition "[ISO 15926-4] A <HEADER> is an <ARTEFACT> and a <PIPING NETWORK SEGMENT> that is pipe or manifold that is used to collect the discharge from many smaller pipes (a collecting header) , or can be used to distribute fluid to many smaller pipes (distributing header)"@en ;
skos:definition "[SLB Glossary] The location, acquisition and processing parameters, and other pertinent information attached to a well log, seismic record and traces."@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
FluidDistributionFunction
⊑ DesignedFunction
Realized in
FluidDistributionProcess
⊑ MomentumTransfer
The identity-giving function is fluid distribution - headers are designed to either collect fluid from multiple smaller pipes or distribute fluid to multiple smaller pipes. This aligns with the already-enriched 'manifold' class which has the same function.
2
Genus Determination
Manifold
Headers and manifolds serve the same functional role (fluid distribution/collection) but headers are specifically characterized by connecting to 'many smaller pipes' rather than general fluid distribution. Manifold is already enriched in the ontology with FluidDistributionFunction and Assembly genus, making it the appropriate superclass.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
Headers inherit basic manifold parts but specifically require multiple connections to accommodate the many smaller pipes they interface with.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— from smaller pipes or single main
Outputs (O)
PortionOfFluid
— to smaller pipes or single main
Transformation (T)
flow redistribution among multiple streams
Headers transform between single/few large streams and multiple smaller streams, enabling collection or distribution functionality.
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.
Cross-Standard Observations
The SLB definition refers to data/log headers (information objects), which is completely different from the ISO 15926 definition of physical piping equipment. The analysis focuses on the ISO 15926 definition as it represents the physical equipment concept.
