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More precise KBV Item/Holding model #483

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More precise KBV Item/Holding model #483

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e3b2775
Add new precise holding subclasses and properties
niklasl Apr 29, 2024
58f20ad
Revise detailed holding/item model
niklasl Jun 3, 2024
8a5f844
Change from SomeItems to HeldComponent
niklasl May 22, 2026
b867ec1
Remove MultipleItems from suggestion
niklasl May 22, 2026
7287d09
Suggest that Item may be abstract (but not HeldComponent)
niklasl May 22, 2026
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42 changes: 18 additions & 24 deletions source/vocab/items.ttl
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix ptg: <http://protege.stanford.edu/plugins/owl/protege#> .
@prefix sdo: <http://schema.org/> .
@prefix bf2: <http://id.loc.gov/ontologies/bibframe/> .
@prefix rdaent: <http://rdvocab.info/uri/schema/FRBRentitiesRDA/> .
Expand All @@ -20,24 +21,31 @@
# OTHER ITEM PROPERTIES AND CLASSES
# RETAINED SCHEMA/BF1 MAPPINGS
# EARLY LOCAL LIBRIS HOLDING TERMS
# MODEL SUGGESTIONS

##
# BF2 ITEM/HOLDING LOCATION

:Item a owl:Class ;
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#ptg:abstract true ;
rdfs:label "Item"@en, "Bestånd"@sv ;

@niklasl niklasl Aug 25, 2026

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Suggested change
rdfs:label "Item"@en, "Bestånd"@sv ;
rdfs:label "Item information"@en, "Exemplarsinformation"@sv ;

:category marc:hold;
rdfs:subClassOf :Embodiment;
rdfs:subClassOf :Embodiment, sdo:Product;
skos:closeMatch rdaent:Item;
owl:equivalentClass bf2:Item, sdo:Product, holding:Item .
#TODO?: owl:equivalentClass [ owl:unionOf (sdo:Product sdo:Offer) ] ;
owl:equivalentClass bf2:Item, holding:Item .

:ItemHolding a owl:Class ;
rdfs:label "Item holding"@en, "Beståndsinnehav"@sv ;

@niklasl niklasl Aug 25, 2026

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Suggested change
rdfs:label "Item holding"@en, "Beståndsinnehav"@sv ;
rdfs:label "Holding"@en, "Bestånd"@sv ;

rdfs:subClassOf :Item , sdo:Offer .

:HeldComponent a owl:Class ;
:category marc:none ;
rdfs:label "Held component"@en, "Beståndskomponent"@sv ;
rdfs:subClassOf :Item .

:SingleItem a owl:Class ;
rdfs:subClassOf :Item ;
rdfs:subClassOf :HeldComponent , sdo:IndividualProduct ;
:category marc:none ;
owl:equivalentClass sdo:IndividualProduct ;
rdfs:label "Single item"@en, "Exemplar"@sv .
rdfs:label "Single item"@en, "Enskilt exemplar"@sv .

:itemOf a owl:ObjectProperty ;
rdfs:label "Holding for"@en, "bestånd på"@sv ;
Expand Down Expand Up @@ -255,11 +263,10 @@
:hasComponent a owl:ObjectProperty ;
rdfs:label "has component"@en, "har komponent"@sv ;
:category :compositional, :integral;
rdfs:subPropertyOf bf2:hasPart ;
rdfs:domain :Item ;
rdfs:subPropertyOf bf2:hasPart, sdo:itemOffered ;
rdfs:domain :ItemHolding ;
owl:inverseOf :componentOf ;
# TODO: rdfs:domain :SomeItems ;
rdfs:range :Item ;
rdfs:range :HeldComponent ;
skos:note "Retained from BF1 to enable an Item entity to describe several Items within the same holding. (Historically due to local variations in Libris MARC21-spec.)"@en .

:componentOf a owl:ObjectProperty ;
Expand Down Expand Up @@ -312,16 +319,3 @@
rdfs:range rdfs:Literal ;
rdfs:comment "Om materialet ställs upp efter titel, författare, ämne eller annat beskrivande uppställningsord. Kan kombineras med kompletterande placeringsuppgifter, t.ex. klassifikation eller uppställningsord."@sv;
skos:example "Deckare", "Lagerlöf" .


# MODEL SUGGESTIONS
#
# :MultipleItems a owl:Class ;
# rdfs:subClassOf :Item ;
# owl:equivalentClass sdo:SomeProducts ;
# rdfs:label "Multiple items"@en, "Flera exemplar"@sv .

# :IndividualItem a owl:Class ;
# rdfs:subClassOf :Item ;
# owl:equivalentClass sdo:IndividualProduct ;
# rdfs:label "Individual item"@en, "Enskilt exemplar"@sv .