diff --git a/ontology/saref4bldg.ttl b/ontology/saref4bldg.ttl
index 788f7495f2264f7682835311bea8566c7eeca179..9b064f34034e4ba2135db9ff14798fc4055305f6 100644
--- a/ontology/saref4bldg.ttl
+++ b/ontology/saref4bldg.ttl
@@ -1,5 +1,4 @@
 @prefix : <https://saref.etsi.org/saref4bldg/> .
-@prefix dc: <http://purl.org/dc/elements/1.1/> .
 @prefix owl: <http://www.w3.org/2002/07/owl#> .
 @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
 @prefix xml: <http://www.w3.org/XML/1998/namespace> .
@@ -13,15 +12,18 @@
 <https://saref.etsi.org/saref4bldg/> a owl:Ontology ;
 	owl:versionIRI <https://saref.etsi.org/saref4bldg/v1.1.2/> ;
 	dcterms:creator <http://purl.org/net/mpoveda> , <http://www.garcia-castro.com/foaf.rdf#me> ;
-	dcterms:license <http://purl.org/NET/rdflicense/cc-by4.0> ;
+	dcterms:license <hhttps://forge.etsi.org/etsi-software-license> ;
 	vann:preferredNamespaceUri "https://saref.etsi.org/saref4bldg/" ;
-	dc:title "SAREF extension for building devices"@en ;
-	dc:publisher <http://www.oeg-upm.net/> ;
+	dcterms:title "SAREF extension for building devices"@en ;
+	dcterms:publisher <https://www.etsi.org> ;
+	dcterms:modified "2020-04-13" ;
+	dcterms:issued "2020-04-13" ;
+	dcterms:source <https://forge.etsi.org/rep/SAREF/saref4bldg> ;
 	vann:preferredNamespacePrefix "s4bldg" ;
-	dc:description "This ontology extends the SAREF ontology for the building domain by defining building devices and how they are located in a building. This extension is based on the ISO 16739:2013 Industry Foundation Classes (IFC) standard for data sharing in the construction and facility management industries. The descriptions of the classes and properties extracted from IFC have been taken from the IFC documentation."@en ;
+	dcterms:description "This ontology extends the SAREF ontology for the building domain by defining building devices and how they are located in a building. This extension is based on the ISO 16739:2013 Industry Foundation Classes (IFC) standard for data sharing in the construction and facility management industries. The descriptions of the classes and properties extracted from IFC have been taken from the IFC documentation."@en ;
                                       rdfs:comment """Information about changes compared to version 1.1.1: 
  - Updated namespaces for compatibility with SAREF v3."""@en ;
-                                      owl:versionInfo "1.1.2" .
+                                      owl:versionInfo "v1.1.2" .
 # 
 # 
 # #################################################################
@@ -35,6 +37,18 @@
 
 dcterms:creator a owl:AnnotationProperty .
 # 
+# http://purl.org/dc/terms/modified
+
+dcterms:modified a owl:AnnotationProperty .
+#
+# http://purl.org/dc/terms/issued
+
+dcterms:issued a owl:AnnotationProperty .
+#
+# http://purl.org/dc/terms/source
+
+dcterms:source a owl:AnnotationProperty .
+#
 # http://purl.org/dc/terms/dateCopyrighted
 
 dcterms:dateCopyrighted a owl:AnnotationProperty .
@@ -42,6 +56,7 @@ dcterms:dateCopyrighted a owl:AnnotationProperty .
 # http://purl.org/dc/terms/rightsHolder
 
 dcterms:rightsHolder a owl:AnnotationProperty .
+
 # 
 # http://purl.org/vocab/vann/preferredNamespacePrefix