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-rw-r--r--src/ontologies/nepomuk/90-tracker.ontology7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/ontologies/nepomuk/90-tracker.ontology b/src/ontologies/nepomuk/90-tracker.ontology
index 1fd59d4de..3e16e914f 100644
--- a/src/ontologies/nepomuk/90-tracker.ontology
+++ b/src/ontologies/nepomuk/90-tracker.ontology
@@ -79,3 +79,10 @@ tracker:hasExternalReference a rdf:Property ;
rdfs:comment "Links the information element with the external reference" ;
rdfs:domain nie:InformationElement ;
rdfs:range tracker:ExternalReference .
+
+tracker:extractorHash a rdf:Property ;
+ rdfs:label "Extractor hash" ;
+ rdfs:comment "Hash identifying the extractor of the metadata" ;
+ nrl:maxCardinality 1 ;
+ rdfs:domain nfo:FileDataObject ;
+ rdfs:range xsd:string .