@prefix twb:     <https://w3id.org/twb#> .
@prefix bot:     <https://w3id.org/bot#> .
@prefix prov:    <http://www.w3.org/ns/prov#> .
@prefix owl:     <http://www.w3.org/2002/07/owl#> .
@prefix rdfs:    <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd:     <http://www.w3.org/2001/XMLSchema#> .
@prefix skos:    <http://www.w3.org/2004/02/skos/core#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix vann:    <http://purl.org/vocab/vann/> .
@prefix unit:    <http://qudt.org/vocab/unit/> .

# =================================================================================================
#  TWB derivation — a module of the Thin-Walled Blueprint ontology (TWB)
#
#  The element-level building derived from a blueprint by a deterministic compilation: the
#  derivation, the members it makes with their roles, sections and processings, the pieces of the
#  non-core layers, and the rule, standard or template that governed each.
#
#  TWB is modular, as SEAS is: one namespace (twb:, https://w3id.org/twb#) shared by every module,
#  each module an ontology of its own that imports only the modules it builds on, and every term
#  stating the module that defines it (rdfs:isDefinedBy). https://w3id.org/twb imports them all.
#
#  Working draft, version 0.3.0 (2026-10-13).
# =================================================================================================

<https://w3id.org/twb/derivation>
    a owl:Ontology ;
    dcterms:title "TWB derivation"@en ;
    dcterms:description """The element-level building derived from a blueprint by a
deterministic compilation: the derivation, the members it makes with their roles, sections and processings, the
pieces of the non-core layers, and the rule, standard or template that governed each."""@en ;
    dcterms:creator "Mads Holten Rasmussen" ;
    dcterms:license <https://creativecommons.org/licenses/by/4.0/> ;
    dcterms:isPartOf <https://w3id.org/twb> ;
    vann:preferredNamespacePrefix "twb" ;
    vann:preferredNamespaceUri "https://w3id.org/twb#" ;
    owl:imports <https://w3id.org/twb/detailing> ;
    owl:versionInfo "0.3.0" ;
    owl:versionIRI <https://w3id.org/twb/derivation/0.3.0> ;
    dcterms:modified "2026-10-13"^^xsd:date .

# =================================================================================================
#  Derivation
# =================================================================================================

twb:Derivation
    a owl:Class ;
    rdfs:subClassOf prov:Activity ;
    rdfs:label "Derivation"@en ;
    rdfs:comment """A deterministic compilation of a blueprint into element-level information (members, layer pieces,
machining, IFC, calculations). It uses the blueprint (prov:used) and follows it as a plan; its outputs are
prov:wasGeneratedBy it. Re-running it on an unchanged blueprint yields the same outputs."""@en ;
    rdfs:isDefinedBy <https://w3id.org/twb/derivation> .

twb:governedBy
    a owl:ObjectProperty ;
    rdfs:label "governed by"@en ;
    rdfs:comment "Links a derived element or value to the rule option, standard or template that decided it."@en ;
    rdfs:isDefinedBy <https://w3id.org/twb/derivation> .

# =================================================================================================
#  Derived elements
# =================================================================================================

twb:Member
    a owl:Class ;
    rdfs:subClassOf bot:Element ;
    rdfs:label "Member"@en ;
    rdfs:comment """A linear structural piece derived from the blueprint: a stud, plate, header, joist, rafter, beam, post.
It is a sub-element of the surface it frames (bot:hasSubElement), derived from that surface or from the edge or
opening that called for it, and it names the rule that governed it."""@en ;
    twb:archTerm "TimberMember (recipe/timber-member.ts)" ;
    twb:ifcCounterpart "IfcMember / IfcBeam / IfcColumn, aggregated into an IfcElementAssembly per surface" ;
    rdfs:isDefinedBy <https://w3id.org/twb/derivation> .

twb:memberRole
    a owl:ObjectProperty, owl:FunctionalProperty ;
    rdfs:label "member role"@en ;
    rdfs:domain twb:Member ;
    rdfs:range twb:MemberRole ;
    rdfs:isDefinedBy <https://w3id.org/twb/derivation> .

twb:MemberRole
    a owl:Class ;
    rdfs:subClassOf skos:Concept ;
    rdfs:label "Member role"@en ;
    twb:ifcCounterpart "IfcMemberTypeEnum / IfcBeamTypeEnum (PredefinedType) and ObjectType" ;
    rdfs:isDefinedBy <https://w3id.org/twb/derivation> .

twb:sectionWidth a owl:DatatypeProperty ; rdfs:label "section width"@en ; rdfs:domain twb:Member ; rdfs:range xsd:decimal ; twb:unit unit:MilliM ;
    rdfs:isDefinedBy <https://w3id.org/twb/derivation> .
twb:sectionDepth a owl:DatatypeProperty ; rdfs:label "section depth"@en ; rdfs:domain twb:Member ; rdfs:range xsd:decimal ; twb:unit unit:MilliM ;
    rdfs:isDefinedBy <https://w3id.org/twb/derivation> .
twb:strengthClass a owl:DatatypeProperty ; rdfs:label "strength class"@en ; rdfs:domain twb:Member ; rdfs:range xsd:string ;
    rdfs:isDefinedBy <https://w3id.org/twb/derivation> .
twb:hasProcessing
    a owl:ObjectProperty ;
    rdfs:label "has processing"@en ;
    rdfs:domain twb:Member ;
    rdfs:range twb:Processing ;
    rdfs:isDefinedBy <https://w3id.org/twb/derivation> .

twb:LayerPiece
    a owl:Class ;
    rdfs:subClassOf bot:Element ;
    rdfs:label "Layer piece"@en ;
    rdfs:comment "A piece of a non-core layer as derived for one surface: a sheet with its openings cut out, a board, an insulation bay."@en ;
    rdfs:isDefinedBy <https://w3id.org/twb/derivation> .

twb:ofLayer
    a owl:ObjectProperty, owl:FunctionalProperty ;
    rdfs:label "of layer"@en ;
    rdfs:domain twb:LayerPiece ;
    rdfs:range twb:Layer ;
    rdfs:isDefinedBy <https://w3id.org/twb/derivation> .

twb:ifcGlobalId
    a owl:DatatypeProperty ;
    rdfs:label "IFC GlobalId"@en ;
    rdfs:comment "The GlobalId the element is exported with. Derived from the element's own key, so it is stable across exports."@en ;
    rdfs:range xsd:string ;
    rdfs:isDefinedBy <https://w3id.org/twb/derivation> .