@prefix : . @prefix owl: . @prefix rdf: . @prefix xml: . @prefix xsd: . @prefix rdfs: . @base . rdf:type owl:Ontology ; owl:versionIRI ; "bcfOWL represents the BIM Collaboration Format (BCF) in RDF. It does not translate the BCF schema one to one. It composes BCF from established vocabularies (SOSA, SPOT, PROV-O, DCAT, SKOS, Dublin Core) and keeps only the coordination concepts that no other vocabulary covers, such as Topic, Comment, Viewpoint, and the visual state."@en ; "Schulz, O., Oraskari, J., & Beetz, J. (2026). bcfOWL: BIM Collaboration Format Ontology (Version 1.0.0) [Ontology]. Design Computation, RWTH Aachen University. https://w3id.org/bcfOWL"@en ; _:genid1 , _:genid3 , _:genid4 ; "bcfOWL covers the BCF concepts Project, Topic, Comment and Viewpoint, the project-specific extension values, and the visual state of a Viewpoint. Generic concerns are delegated to established vocabularies: identity and creation to Dublin Core Terms, cameras and observations to SOSA, poses to SPOT, images to DCAT, agents and change history to PROV-O, and extension values to SKOS. The structural rules of BCF are not OWL axioms. They are in the separate SHACL profile bcfOWL-shapes. The changes since the last published version, 0.7.1, are listed in CHANGELOG.md."@en ; "2026-10-07"^^xsd:date ; ; "2026-10-07"^^xsd:date ; _:genid5 ; "BIM Collaboration Format Ontology"@en ; "bcfOWL" ; ; rdfs:label "bcfOWL"@en ; rdfs:seeAlso ; owl:incompatibleWith ; owl:priorVersion ; owl:versionInfo "1.0.0" . _:genid1 rdf:type ; _:genid2 ; "Oliver Schulz" ; "https://github.com/OlliSchu" . _:genid3 rdf:type ; _:genid2 ; "Jyrki Oraskari" ; "https://github.com/jyrkioraskari" . _:genid4 rdf:type ; _:genid2 ; "Jakob Beetz" ; "https://github.com/jakob-beetz" . _:genid5 rdf:type ; "Jyrki Oraskari" . _:genid2 rdf:type ; "Design Computation, RWTH Aachen University" ; "https://dc.rwth-aachen.de/" . ################################################################# # Annotation properties ################################################################# ### http://purl.org/dc/terms/abstract rdf:type owl:AnnotationProperty . ### http://purl.org/dc/terms/bibliographicCitation rdf:type owl:AnnotationProperty . ### http://purl.org/dc/terms/creator rdf:type owl:AnnotationProperty . ### http://purl.org/dc/terms/description rdf:type owl:AnnotationProperty . ### http://purl.org/dc/terms/issued rdf:type owl:AnnotationProperty . ### http://purl.org/dc/terms/license rdf:type owl:AnnotationProperty . ### http://purl.org/dc/terms/modified rdf:type owl:AnnotationProperty . ### http://purl.org/dc/terms/publisher rdf:type owl:AnnotationProperty . ### http://purl.org/dc/terms/title rdf:type owl:AnnotationProperty . ### http://purl.org/vocab/vann/preferredNamespacePrefix rdf:type owl:AnnotationProperty . ### http://purl.org/vocab/vann/preferredNamespaceUri rdf:type owl:AnnotationProperty . ### http://schema.org/affiliation rdf:type owl:AnnotationProperty . ### http://schema.org/name rdf:type owl:AnnotationProperty . ### http://schema.org/url rdf:type owl:AnnotationProperty . ################################################################# # Datatypes ################################################################# ### http://www.w3.org/2001/XMLSchema#date xsd:date rdf:type rdfs:Datatype . ### https://w3id.org/bcfOWL#point3D :point3D rdf:type rdfs:Datatype ; rdfs:comment "A canonical JSON-style array of exactly three finite decimal numbers [X,Y,Z], representing a position in metres in the viewpoint's immediate SPOT context space."@en ; rdfs:label "3D point"@en . ### https://w3id.org/bcfOWL#vector3D :vector3D rdf:type rdfs:Datatype ; rdfs:comment "A canonical JSON-style array of exactly three finite decimal numbers [X,Y,Z], representing a non-zero dimensionless direction in the viewpoint's immediate SPOT context space. Applications normalize it where BCF requires a unit vector."@en ; rdfs:label "3D vector"@en . ################################################################# # Object Properties ################################################################# ### https://w3id.org/bcfOWL#hasAssignedTo :hasAssignedTo rdf:type owl:ObjectProperty ; rdfs:domain :Topic ; rdfs:range ; rdfs:comment "The agent to whom this topic is assigned, expected to be one of the project's hasUser agents. A forward-looking responsibility, not provenance."@en ; rdfs:label "has Assigned To"@en . ### https://w3id.org/bcfOWL#hasBitmap :hasBitmap rdf:type owl:ObjectProperty ; rdfs:domain :Viewpoint ; rdfs:range :Bitmap ; rdfs:label "has Bitmap"@en . ### https://w3id.org/bcfOWL#hasBitmapImage :hasBitmapImage rdf:type owl:ObjectProperty ; rdfs:domain :Bitmap ; rdfs:range ; rdfs:comment "External binary image represented as a DCAT Dataset with a Distribution."@en ; rdfs:label "has Bitmap Image"@en . ### https://w3id.org/bcfOWL#hasClippingPlane :hasClippingPlane rdf:type owl:ObjectProperty ; rdfs:domain :Viewpoint ; rdfs:range :ClippingPlane ; rdfs:label "has Clipping Plane"@en . ### https://w3id.org/bcfOWL#hasColoring :hasColoring rdf:type owl:ObjectProperty ; rdfs:domain :Viewpoint ; rdfs:range :Coloring ; rdfs:label "has Coloring"@en . ### https://w3id.org/bcfOWL#hasComponent :hasComponent rdf:type owl:ObjectProperty ; rdfs:domain :Coloring ; rdfs:range :Component ; rdfs:comment "Component included in a Coloring resource."@en ; rdfs:label "has Component"@en . ### https://w3id.org/bcfOWL#hasElement :hasElement rdf:type owl:ObjectProperty ; rdfs:domain :Component ; rdfs:range ; rdfs:comment "Linked data reference to the building element."@en ; rdfs:label "has Element"@en . ### https://w3id.org/bcfOWL#hasExtensionSchema :hasExtensionSchema rdf:type owl:ObjectProperty ; rdfs:domain :Project ; rdfs:range :ExtensionSchema ; rdfs:comment "URI to the extension schema."@en ; rdfs:label "has Extension Schema"@en . ### https://w3id.org/bcfOWL#hasLabelScheme :hasLabelScheme rdf:type owl:ObjectProperty ; rdfs:domain :ExtensionSchema ; rdfs:range ; rdfs:comment "The project's scheme of allowed Label values."@en ; rdfs:label "has Label Scheme"@en . ### https://w3id.org/bcfOWL#hasLabels :hasLabels rdf:type owl:ObjectProperty ; rdfs:domain :Topic ; rdfs:range :Label ; rdfs:label "has Label"@en . ### https://w3id.org/bcfOWL#hasLine :hasLine rdf:type owl:ObjectProperty ; rdfs:domain :Viewpoint ; rdfs:range :Line ; rdfs:label "has Line"@en . ### https://w3id.org/bcfOWL#hasOriginatingSystem :hasOriginatingSystem rdf:type owl:ObjectProperty ; rdfs:domain :Component ; rdfs:range :OriginatingSystem ; rdfs:label "has Originating System"@en . ### https://w3id.org/bcfOWL#hasOrthogonalCamera :hasOrthogonalCamera rdf:type owl:ObjectProperty ; rdfs:domain :Viewpoint ; owl:propertyDisjointWith :hasPerspectiveCamera . ### https://w3id.org/bcfOWL#hasPerspectiveCamera :hasPerspectiveCamera rdf:type owl:ObjectProperty ; rdfs:domain :Viewpoint . ### https://w3id.org/bcfOWL#hasPriority :hasPriority rdf:type owl:ObjectProperty ; rdfs:domain :Topic ; rdfs:range :Priority ; rdfs:label "has Priority"@en . ### https://w3id.org/bcfOWL#hasPriorityScheme :hasPriorityScheme rdf:type owl:ObjectProperty ; rdfs:domain :ExtensionSchema ; rdfs:range ; rdfs:comment "The project's scheme of allowed Priority values."@en ; rdfs:label "has Priority Scheme"@en . ### https://w3id.org/bcfOWL#hasProject :hasProject rdf:type owl:ObjectProperty ; rdfs:domain [ rdf:type owl:Class ; owl:unionOf ( :Comment :Topic :Viewpoint ) ] ; rdfs:range :Project ; rdfs:comment "Reference to the corresponding Project."@en ; rdfs:label "has Project"@en . ### https://w3id.org/bcfOWL#hasReferenceLink :hasReferenceLink rdf:type owl:ObjectProperty ; rdfs:domain :Topic ; rdfs:range rdfs:Resource ; rdfs:comment "A resource listed in the BCF reference_links field of the topic. It can be any IRI, for example a document or a building element. The role of the target can be stated with a more precise predicate such as schema:about."@en ; rdfs:label "has reference link"@en . ### https://w3id.org/bcfOWL#hasSelectedComponent :hasSelectedComponent rdf:type owl:ObjectProperty ; rdfs:domain :Viewpoint ; rdfs:range :Component ; rdfs:comment "A component selected in this viewpoint; repeated statements represent the BCF selection array."@en ; rdfs:label "has Selected Component"@en . ### https://w3id.org/bcfOWL#hasSnapshot :hasSnapshot rdf:type owl:ObjectProperty ; rdfs:domain :Viewpoint ; rdfs:range ; rdfs:comment "Optional denormalized shortcut to the snapshot image for BCF serialization. The same media is otherwise the referenced observation's sosa:hasResult."@en ; rdfs:label "has Snapshot"@en . ### https://w3id.org/bcfOWL#hasStage :hasStage rdf:type owl:ObjectProperty ; rdfs:domain :Topic ; rdfs:range :Stage ; rdfs:label "has Stage"@en . ### https://w3id.org/bcfOWL#hasStageScheme :hasStageScheme rdf:type owl:ObjectProperty ; rdfs:domain :ExtensionSchema ; rdfs:range ; rdfs:comment "The project's scheme of allowed Stage values."@en ; rdfs:label "has Stage Scheme"@en . ### https://w3id.org/bcfOWL#hasStatusScheme :hasStatusScheme rdf:type owl:ObjectProperty ; rdfs:domain :ExtensionSchema ; rdfs:range ; rdfs:comment "The project's scheme of allowed TopicStatus values."@en ; rdfs:label "has Status Scheme"@en . ### https://w3id.org/bcfOWL#hasTopic :hasTopic rdf:type owl:ObjectProperty ; rdfs:domain [ rdf:type owl:Class ; owl:unionOf ( :Comment :Viewpoint ) ] ; rdfs:range :Topic ; rdfs:comment "Link to the relating topic."@en ; rdfs:label "has Topic"@en . ### https://w3id.org/bcfOWL#hasTopicStatus :hasTopicStatus rdf:type owl:ObjectProperty ; rdfs:domain :Topic ; rdfs:range :TopicStatus ; rdfs:label "has Topic Status"@en . ### https://w3id.org/bcfOWL#hasTopicType :hasTopicType rdf:type owl:ObjectProperty ; rdfs:domain :Topic ; rdfs:range :TopicType ; rdfs:label "has Topic Type"@en . ### https://w3id.org/bcfOWL#hasTypeScheme :hasTypeScheme rdf:type owl:ObjectProperty ; rdfs:domain :ExtensionSchema ; rdfs:range ; rdfs:comment "The project's scheme of allowed TopicType values."@en ; rdfs:label "has Type Scheme"@en . ### https://w3id.org/bcfOWL#hasUser :hasUser rdf:type owl:ObjectProperty ; rdfs:domain :ExtensionSchema ; rdfs:range ; rdfs:comment "An agent valid in this project; the BCF 3.0 'users' list from which creators and assignees are drawn."@en ; rdfs:label "has User"@en . ### https://w3id.org/bcfOWL#hasViewpoint :hasViewpoint rdf:type owl:ObjectProperty ; rdfs:domain :Comment ; rdfs:range :Viewpoint ; rdfs:comment "Reference to the viewpoint this comment relates to."@en ; rdfs:label "has Viewpoint"@en . ### https://w3id.org/bcfOWL#hasVisibilityException :hasVisibilityException rdf:type owl:ObjectProperty ; rdfs:domain :Viewpoint ; rdfs:range :Component ; rdfs:comment "A component whose visibility is inverted after defaults and view-setup hints are applied."@en ; rdfs:label "has Visibility Exception"@en . ### https://w3id.org/bcfOWL#modifiedBy :modifiedBy rdf:type owl:ObjectProperty ; rdfs:domain [ rdf:type owl:Class ; owl:unionOf ( :Comment :Topic ) ] ; rdfs:range ; rdfs:comment "The agent of the latest modification (the BCF field ModifiedAuthor). A shortcut for the BCF round trip. The full history is in the provenance statements."@en ; rdfs:label "modified by"@en . ### https://w3id.org/bcfOWL#referenceSpace :referenceSpace rdf:type owl:ObjectProperty ; rdfs:domain :Project ; rdfs:range ; rdfs:comment "The spot:AssetSpace in which BCF API coordinates for this Project are exposed and accepted."@en ; rdfs:label "reference space"@en . ################################################################# # Data properties ################################################################# ### http://purl.org/dc/terms/identifier rdf:type owl:DatatypeProperty . ### https://w3id.org/bcfOWL#hasAspectRatio :hasAspectRatio rdf:type owl:DatatypeProperty ; rdfs:domain ; rdfs:range xsd:double ; rdfs:comment "Width-to-height ratio of the perspective or orthogonal camera observation."@en ; rdfs:label "has Aspect Ratio"@en . ### https://w3id.org/bcfOWL#hasAuthoringToolId :hasAuthoringToolId rdf:type owl:DatatypeProperty ; rdfs:subPropertyOf ; rdfs:domain :Component ; rdfs:range xsd:string ; rdfs:label "has Authoring Tool Id"@en . ### https://w3id.org/bcfOWL#hasColor :hasColor rdf:type owl:DatatypeProperty ; rdfs:domain :Coloring ; rdfs:range xsd:string ; rdfs:comment "Six-digit RGB or eight-digit ARGB hexadecimal color as defined by BCF."@en ; rdfs:label "has Color"@en . ### https://w3id.org/bcfOWL#hasCommentText :hasCommentText rdf:type owl:DatatypeProperty ; rdfs:domain :Comment ; rdfs:range xsd:string ; rdfs:comment "The comment text. Mutable; history is statement-level."@en ; rdfs:label "has Comment Text"@en . ### https://w3id.org/bcfOWL#hasDefaultVisibility :hasDefaultVisibility rdf:type owl:DatatypeProperty ; rdfs:domain :Viewpoint ; rdfs:range xsd:boolean ; rdfs:comment "Default visibility state before view-setup hints and visibility exceptions are applied."@en ; rdfs:label "has Default Visibility"@en . ### https://w3id.org/bcfOWL#hasDirection :hasDirection rdf:type owl:DatatypeProperty ; rdfs:domain :ClippingPlane ; rdfs:range :vector3D ; rdfs:label "has Direction"@en . ### https://w3id.org/bcfOWL#hasDueDate :hasDueDate rdf:type owl:DatatypeProperty ; rdfs:domain :Topic ; rdfs:range xsd:dateTime ; rdfs:comment "Date until when the topic's issue needs to be resolved."@en ; rdfs:label "has Due Date"@en . ### https://w3id.org/bcfOWL#hasEndPoint :hasEndPoint rdf:type owl:DatatypeProperty ; rdfs:domain :Line ; rdfs:range :point3D ; rdfs:label "has End Point"@en . ### https://w3id.org/bcfOWL#hasFieldOfView :hasFieldOfView rdf:type owl:DatatypeProperty ; rdfs:domain ; rdfs:range xsd:double ; rdfs:comment "Camera field of view angle in degrees, for a perspective observation."@en ; rdfs:label "has Field of View"@en . ### https://w3id.org/bcfOWL#hasHeight :hasHeight rdf:type owl:DatatypeProperty ; rdfs:domain :Bitmap ; rdfs:range xsd:double ; rdfs:comment "Bitmap height in metres."@en ; rdfs:label "has Height"@en . ### https://w3id.org/bcfOWL#hasIfcGuid :hasIfcGuid rdf:type owl:DatatypeProperty ; rdfs:subPropertyOf ; rdfs:domain :Component ; rdfs:range xsd:string ; rdfs:comment "The IFC GUID of the component, used as a fallback when no linked data URI is available."@en ; rdfs:label "has Ifc Guid"@en . ### https://w3id.org/bcfOWL#hasIndex :hasIndex rdf:type owl:DatatypeProperty ; rdfs:domain [ rdf:type owl:Class ; owl:unionOf ( :Topic :Viewpoint ) ] ; rdfs:range xsd:integer ; rdfs:comment "Optional number used to maintain the order of Topics or Viewpoints."@en ; rdfs:label "has Index"@en . ### https://w3id.org/bcfOWL#hasLocation :hasLocation rdf:type owl:DatatypeProperty ; rdfs:domain [ rdf:type owl:Class ; owl:unionOf ( :Bitmap :ClippingPlane ) ] ; rdfs:range :point3D ; rdfs:label "has Location"@en . ### https://w3id.org/bcfOWL#hasNormal :hasNormal rdf:type owl:DatatypeProperty ; rdfs:domain :Bitmap ; rdfs:range :vector3D ; rdfs:label "has Normal"@en . ### https://w3id.org/bcfOWL#hasOrthogonalCamera :hasOrthogonalCamera rdf:type owl:DatatypeProperty ; rdfs:range ; owl:propertyDisjointWith :hasPerspectiveCamera . ### https://w3id.org/bcfOWL#hasPerspectiveCamera :hasPerspectiveCamera rdf:type owl:DatatypeProperty ; rdfs:range . ### https://w3id.org/bcfOWL#hasStartPoint :hasStartPoint rdf:type owl:DatatypeProperty ; rdfs:domain :Line ; rdfs:range :point3D ; rdfs:label "has Start Point"@en . ### https://w3id.org/bcfOWL#hasUpVector :hasUpVector rdf:type owl:DatatypeProperty ; rdfs:domain :Bitmap ; rdfs:range :vector3D ; rdfs:label "has Up Vector"@en . ### https://w3id.org/bcfOWL#hasViewToWorldScale :hasViewToWorldScale rdf:type owl:DatatypeProperty ; rdfs:domain ; rdfs:range xsd:double ; rdfs:comment "Proportion of view to model, for an orthogonal observation."@en ; rdfs:label "has View To World Scale"@en . ### https://w3id.org/bcfOWL#openingsVisible :openingsVisible rdf:type owl:DatatypeProperty ; rdfs:domain :Viewpoint ; rdfs:range xsd:boolean ; rdfs:comment "Explicit view-setup override for opening components, applied after default visibility."@en ; rdfs:label "openings Visible"@en . ### https://w3id.org/bcfOWL#spaceBoundariesVisible :spaceBoundariesVisible rdf:type owl:DatatypeProperty ; rdfs:domain :Viewpoint ; rdfs:range xsd:boolean ; rdfs:comment "Explicit view-setup override for space-boundary components, applied after default visibility."@en ; rdfs:label "space Boundaries Visible"@en . ### https://w3id.org/bcfOWL#spacesVisible :spacesVisible rdf:type owl:DatatypeProperty ; rdfs:domain :Viewpoint ; rdfs:range xsd:boolean ; rdfs:comment "Explicit view-setup override for spatial components, applied after default visibility."@en ; rdfs:label "spaces Visible"@en . ################################################################# # Classes ################################################################# ### http://schema.org/Organization rdf:type owl:Class . ### http://schema.org/Person rdf:type owl:Class . ### http://www.w3.org/2000/01/rdf-schema#Resource rdfs:Resource rdf:type owl:Class . ### http://www.w3.org/2004/02/skos/core#Concept rdf:type owl:Class . ### http://www.w3.org/2004/02/skos/core#ConceptScheme rdf:type owl:Class . ### http://www.w3.org/ns/dcat#Dataset rdf:type owl:Class . ### http://www.w3.org/ns/prov#Agent rdf:type owl:Class . ### https://w3id.org/bcfOWL#Bitmap :Bitmap rdf:type owl:Class ; rdfs:comment "Viewpoint-internal placement of an externally represented bitmap image."@en ; rdfs:label "Bitmap"@en . ### https://w3id.org/bcfOWL#ClippingPlane :ClippingPlane rdf:type owl:Class ; rdfs:comment "Viewpoint-internal blank-node markup defining a plane by a location and a direction toward the clipped half-space."@en ; rdfs:label "Clipping Plane"@en . ### https://w3id.org/bcfOWL#Coloring :Coloring rdf:type owl:Class ; rdfs:comment "Viewpoint-internal blank-node relation mapping an RGB or ARGB color to one or more Components."@en ; rdfs:label "Coloring"@en . ### https://w3id.org/bcfOWL#Comment :Comment rdf:type owl:Class ; rdfs:comment "A comment related to a topic. Its purpose is to record discussion between different parties related to the topic."@en ; rdfs:label "Comment"@en . ### https://w3id.org/bcfOWL#Component :Component rdf:type owl:Class ; rdfs:comment "Stable BCF component descriptor linking to a building element and retaining round-trip identifiers."@en ; rdfs:label "Component"@en . ### https://w3id.org/bcfOWL#ExtensionSchema :ExtensionSchema rdf:type owl:Class ; rdfs:comment "The extension schema defines the allowed values of a BCF project: one skos:ConceptScheme each for type, status, label, priority and stage. A value belongs to its scheme with skos:inScheme."@en ; rdfs:label "Extension Schema"@en . ### https://w3id.org/bcfOWL#Label :Label rdf:type owl:Class ; rdfs:subClassOf ; rdfs:comment "Tag for categorizing issues."@en ; rdfs:label "Label"@en . ### https://w3id.org/bcfOWL#Line :Line rdf:type owl:Class ; rdfs:comment "Viewpoint-internal blank-node markup defined by start and end points; equal endpoints represent point-like markup."@en ; rdfs:label "Line"@en . ### https://w3id.org/bcfOWL#OriginatingSystem :OriginatingSystem rdf:type owl:Class ; rdfs:comment "Software with which the respective element was created."@en ; rdfs:label "Originating System"@en . ### https://w3id.org/bcfOWL#Priority :Priority rdf:type owl:Class ; rdfs:subClassOf ; rdfs:comment "Indication of the priority of an issue."@en ; rdfs:label "Priority"@en . ### https://w3id.org/bcfOWL#Project :Project rdf:type owl:Class ; rdfs:comment "The project contains reference information about the project the topics belong to. It refers to the extension schema."@en ; rdfs:label "Project"@en . ### https://w3id.org/bcfOWL#Stage :Stage rdf:type owl:Class ; rdfs:subClassOf ; rdfs:comment "Project stage this topic relates to."@en ; rdfs:label "Stage"@en . ### https://w3id.org/bcfOWL#Topic :Topic rdf:type owl:Class ; rdfs:comment "Contains the reference information of a topic (a BCF issue). The BCF GUID is its dcterms:identifier."@en ; rdfs:label "Topic"@en . ### https://w3id.org/bcfOWL#TopicStatus :TopicStatus rdf:type owl:Class ; rdfs:subClassOf ; rdfs:comment "Status of the issue, e.g. Open, In Progress, Closed."@en ; rdfs:label "Topic Status"@en . ### https://w3id.org/bcfOWL#TopicType :TopicType rdf:type owl:Class ; rdfs:subClassOf ; rdfs:comment "Use case of a BCF issue, e.g. Information Request, Defect."@en ; rdfs:label "Topic Type"@en . ### https://w3id.org/bcfOWL#Viewpoint :Viewpoint rdf:type owl:Class ; rdfs:comment "A viewpoint belongs to a topic and can be referred to by comments. It refers to the camera (a sosa:Observation) and carries the visual state: selection, visibility, coloring, clipping planes, lines and bitmaps. A viewpoint does not change after creation.The coordinates of the visual state are in the space given by spot:appearsIn of the camera pose. See the change log for the camera frame."@en ; rdfs:label "Viewpoint"@en . ### https://w3id.org/bot#Element rdf:type owl:Class . ### https://w3id.org/spot#AssetSpace rdf:type owl:Class . ################################################################# # Annotations ################################################################# :hasOrthogonalCamera rdfs:comment "References the sosa:Observation captured with an orthogonal projection. Requires bcfOWL:hasViewToWorldScale and bcfOWL:hasAspectRatio on the observation for a lossless BCF 3.0 round-trip."@en ; rdfs:label "has Orthogonal Camera"@en . :hasPerspectiveCamera rdfs:comment "References the sosa:Observation captured with a perspective projection. Requires bcfOWL:hasFieldOfView and bcfOWL:hasAspectRatio on the observation for a lossless BCF 3.0 round-trip."@en ; rdfs:label "has Perspective Camera"@en . ### Generated by the OWL API (version 5.1.18) https://github.com/owlcs/owlapi/