diff --git a/data/ontologies/digital-heraldry-ontology-object.ttl b/data/ontologies/digital-heraldry-ontology-object.ttl
index 9f5c2d7a882e313336fa1eaebceb0d3168af8c0d..ae57980e982428956f7d832db2e86806e41135f3 100644
--- a/data/ontologies/digital-heraldry-ontology-object.ttl
+++ b/data/ontologies/digital-heraldry-ontology-object.ttl
@@ -26,6 +26,31 @@
 #    Annotation properties
 #################################################################
 
+###  http://digitalheraldry.org/digital-heraldry-ontology/object#hasDescriptionURL
+dhoo:hasDescriptionURL rdf:type owl:AnnotationProperty ;
+                       rdfs:comment "Provisional property to link an historical object to a webpage with its scholarly description (e.g. the description of a manuscript)"@en ;
+                       rdfs:label "hasDescriptoinURL"@en ;
+                       rdfs:subPropertyOf rdfs:seeAlso .
+
+
+###  http://digitalheraldry.org/digital-heraldry-ontology/object#hasIIIFResource
+dhoo:hasIIIFResource rdf:type owl:AnnotationProperty ;
+                     rdfs:comment "Provisional property to connect entites to IIIF resources"@en ;
+                     rdfs:label "hasIIIFResource"@en ;
+                     rdfs:subPropertyOf rdfs:seeAlso ;
+                     rdfs:range xsd:anyURI ;
+                     rdfs:domain dhoo:Object .
+
+
+###  http://digitalheraldry.org/digital-heraldry-ontology/object#hasScanURL
+dhoo:hasScanURL rdf:type owl:AnnotationProperty ;
+                rdfs:comment "Provisional property to connect historical objects to a digitized representation"@en ;
+                rdfs:label "hasScanURL"@en ;
+                rdfs:subPropertyOf rdfs:seeAlso ;
+                rdfs:range xsd:anyURI ;
+                rdfs:domain dhoo:Object .
+
+
 ###  http://purl.org/dc/terms/creator
 dcterms:creator rdf:type owl:AnnotationProperty .