[tracker/wip/carlosg/miner-changes] ontologies: Add tracker:extractorHash property

[Carlos Garnacho <carlosg src gnome org>]

commit 7faeb615f3cd407f8fd805c6601f8c938444640a
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Jun 18 14:04:20 2020 +0200

    ontologies: Add tracker:extractorHash property
    
    This is a string property that can be set on nfo:FileDataObject,
    it will be used to uniquely identify the extractor that extracted
    its metadata.

 src/ontologies/nepomuk/90-tracker.ontology | 7 +++++++
 1 file changed, 7 insertions(+)
---
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 .