@prefix owl:     <http://www.w3.org/2002/07/owl#> .
@prefix xsd:     <http://www.w3.org/2001/XMLSchema#> .
@prefix rdfs:    <http://www.w3.org/2000/01/rdf-schema#> .
@prefix rdf:     <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix skos:    <http://www.w3.org/2004/02/skos/core#> .
@prefix dc:      <http://purl.org/dc/elements/1.1/> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix bibo:    <http://purl.org/ontology/bibo/> .
@prefix vann:    <http://purl.org/vocab/vann/> .
@prefix cc:      <http://creativecommons.org/ns#> .

@prefix arch:    <https://meta.linked.archi/core#> .
@prefix :        <https://meta.linked.archi/c4/onto#> .

#################################################################
# Ontology Declaration
#################################################################

<https://meta.linked.archi/c4/onto#>
    rdf:type                      owl:Ontology ;
    owl:imports                   <https://meta.linked.archi/core#> ;
    cc:license                    "http://creativecommons.org/licenses/by/4.0/" ;
    vann:preferredNamespaceUri    "https://meta.linked.archi/c4/onto#" ;
    vann:preferredNamespacePrefix "c4" ;
    dcterms:creator               "Kalin Maldzhanski"^^xsd:string ;
    dc:title                      "Linked.Archi C4 Model Ontology"@en ;
    dc:description                '''An RDF/OWL ontology for the C4 model — the abstract, notation-independent
software architecture visualization model created by Simon Brown. Defines the four core
abstraction levels (Person, Software System, Container, Component) and their relationships.

This ontology covers the C4 model itself, not any specific tooling implementation.
For Structurizr-specific concepts (deployment nodes, infrastructure nodes, deployment
environments), see the Structurizr extension ontology (structurizr-onto.ttl) which
imports this ontology.
This is not an official c4model.com document.'''@en ;
    dcterms:created               "2019-03-17"^^xsd:date ;
    dcterms:modified              "2026-04-20"^^xsd:date ;
    dc:publisher                  "Linked.Archi"@en,
                                  <https://linked.archi> ;
    bibo:status                   "draft" ;
    owl:versionIRI                <https://meta.linked.archi/c4/onto/0.3.0#> ;
    owl:versionInfo               "0.3.0"@en ;
    owl:priorVersion              <https://meta.linked.archi/c4/onto/0.2.0#> ;
    rdfs:seeAlso                  <https://c4model.com/> ;
    dc:source                     <https://c4model.com/> ;
    skos:historyNote              '''0.3.0: Split C4 model from Structurizr implementation. This ontology
now contains only the abstract C4 model concepts. Deployment nodes, infrastructure nodes,
and deployment relationships moved to structurizr-onto.ttl.
0.2.0: Modernized to Linked.Archi conventions.'''@en ;
.

#################################################################
# Element Classes — The C4 Abstraction Hierarchy
#################################################################

:Person
    a               owl:Class ;
    rdfs:subClassOf arch:Element ;
    skos:prefLabel  "Person"@en ;
    skos:definition '''A human user of the software system — a user, actor, role, or persona.
Corresponds to C4 Level 1 (System Context).'''@en ;
    rdfs:seeAlso    <https://c4model.com/abstractions/person> ;
.

:SoftwareSystem
    a               owl:Class ;
    rdfs:subClassOf arch:Element ;
    skos:prefLabel  "Software System"@en ;
    skos:definition '''The highest level of abstraction — a software system that delivers value
to its users. Includes the system being designed and external systems it depends on.
Corresponds to C4 Level 1 (System Context).'''@en ;
    rdfs:seeAlso    <https://c4model.com/abstractions/software-system> ;
.

:Container
    a               owl:Class ;
    rdfs:subClassOf arch:Element ;
    skos:prefLabel  "Container"@en ;
    skos:definition '''A deployable/runnable unit within a software system — a web application,
API service, database, message broker, file system, etc. Not a Docker container
(though it may run in one). Corresponds to C4 Level 2.'''@en ;
    rdfs:seeAlso    <https://c4model.com/abstractions/container> ;
.

:Component
    a               owl:Class ;
    rdfs:subClassOf arch:Element ;
    skos:prefLabel  "Component"@en ;
    skos:definition '''A grouping of related functionality within a container — a module, package,
or cohesive set of classes. Not a class or function. Corresponds to C4 Level 3.'''@en ;
    rdfs:seeAlso    <https://c4model.com/abstractions/component> ;
.


#################################################################
# Relationship Types — Uses
#################################################################

:uses
    a                    owl:ObjectProperty ;
    skos:prefLabel       "Uses"@en ;
    skos:definition      "Indicates that one element uses or interacts with another."@en ;
    arch:domainIncludes  arch:Element ;
    arch:rangeIncludes   arch:Element ;
.

:Using
    a                    owl:Class ;
    rdfs:subClassOf      arch:QualifiedRelationship ;
    arch:unqualifiedForm :uses ;
    skos:prefLabel       "Using"@en ;
    skos:definition      "A using relationship indicates that one element uses or interacts with another."@en ;
    arch:domainIncludes  arch:Element ;
    arch:rangeIncludes   arch:Element ;
.

:qualifiedUses
    a                    owl:ObjectProperty ;
    rdfs:range           :Using ;
    arch:unqualifiedForm :uses ;
.


#################################################################
# Relationship Types — Containment
#################################################################

:hasContainer
    a                    owl:ObjectProperty ;
    skos:prefLabel       "Has Container"@en ;
    skos:definition      "A software system contains containers."@en ;
    arch:domainIncludes  :SoftwareSystem ;
    arch:rangeIncludes   :Container ;
.

:ContainerContainment
    a                    owl:Class ;
    rdfs:subClassOf      arch:QualifiedRelationship ;
    arch:unqualifiedForm :hasContainer ;
    skos:prefLabel       "Container Containment"@en ;
    skos:definition      "A containment relationship from a software system to a container."@en ;
    arch:domainIncludes  :SoftwareSystem ;
    arch:rangeIncludes   :Container ;
.

:qualifiedHasContainer
    a                    owl:ObjectProperty ;
    rdfs:range           :ContainerContainment ;
    arch:unqualifiedForm :hasContainer ;
.

:hasComponent
    a                    owl:ObjectProperty ;
    skos:prefLabel       "Has Component"@en ;
    skos:definition      "A container contains components."@en ;
    arch:domainIncludes  :Container ;
    arch:rangeIncludes   :Component ;
.

:ComponentContainment
    a                    owl:Class ;
    rdfs:subClassOf      arch:QualifiedRelationship ;
    arch:unqualifiedForm :hasComponent ;
    skos:prefLabel       "Component Containment"@en ;
    skos:definition      "A containment relationship from a container to a component."@en ;
    arch:domainIncludes  :Container ;
    arch:rangeIncludes   :Component ;
.

:qualifiedHasComponent
    a                    owl:ObjectProperty ;
    rdfs:range           :ComponentContainment ;
    arch:unqualifiedForm :hasComponent ;
.


#################################################################
# Attribute Properties
#################################################################

:technology
    a               owl:DatatypeProperty ;
    skos:prefLabel  "Technology"@en ;
    skos:definition "Technology stack used by the container (e.g., 'Spring Boot', 'PostgreSQL', 'React')."@en ;
    arch:domainIncludes :Container ;
    rdfs:range      xsd:string ;
.