diff --git a/source/vocab/items.ttl b/source/vocab/items.ttl
index 2c22680f..98c21e7a 100644
--- a/source/vocab/items.ttl
+++ b/source/vocab/items.ttl
@@ -1,6 +1,8 @@
 @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/> .
@@ -20,19 +22,34 @@
 # OTHER ITEM PROPERTIES AND CLASSES
 # RETAINED SCHEMA/BF1 MAPPINGS
 # EARLY LOCAL LIBRIS HOLDING TERMS
-# MODEL SUGGESTIONS
 
 ##
 # BF2 ITEM/HOLDING LOCATION
 
 :Item a owl:Class ;
-    rdfs:label "Item"@en, "Bestånd"@sv ;
+    rdfs:label "Item"@en, "Exemplar"@sv ;
+    ptg:abstract true ;
     :category marc:hold;
     rdfs:subClassOf :Embodiment;
     skos:closeMatch rdaent:Item;
     owl:equivalentClass bf2:Item, sdo:Product, holding:Item .
     #TODO?: owl:equivalentClass [ owl:unionOf (sdo:Product sdo:Offer) ] ;
 
+:ItemHolding a owl:Class ;
+    rdfs:label "Item holding"@en, "Bestånd"@sv ;
+    owl:equivalentClass sdo:Offer ;
+    rdfs:subClassOf :Item .
+
+:MultipleItems a owl:Class ;
+    rdfs:subClassOf :Item ;
+    owl:equivalentClass sdo:SomeProducts ;
+    rdfs:label "Multiple items"@en, "Flera exemplar"@sv .
+
+:SingleItem a owl:Class ;
+    rdfs:subClassOf :Item ;
+    owl:equivalentClass sdo:IndividualProduct ;
+    rdfs:label "Single item"@en, "Enskilt exemplar"@sv .
+
 :itemOf a owl:ObjectProperty ;
     rdfs:label "Holding for"@en, "bestånd på"@sv ;
     owl:inverseOf :hasItem;
@@ -249,8 +266,8 @@
 :hasComponent a owl:ObjectProperty ;
     rdfs:label "has component"@en, "har komponent"@sv ;
     :category :compositional ;
-    rdfs:subPropertyOf bf2:hasPart ;
-    rdfs:domain :Item ;
+    rdfs:subPropertyOf bf2:hasPart, sdo:itemOffered ;
+    rdfs:domain :ItemHolding ;
     # TODO: rdfs:domain :SomeItems ;
     rdfs:range :Item ;
     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 .
@@ -305,16 +322,3 @@
     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 .