diff --git a/perspectives/data.ttl b/perspectives/data.ttl
index 0dfd2ccd..b7dd8030 100644
--- a/perspectives/data.ttl
+++ b/perspectives/data.ttl
@@ -13,12 +13,12 @@
                                            owl:imports <http://emmo.info/emmo/1.0.0-beta5/perspectives/perspective> ;
                                            dcterms:abstract ""@en ;
                                            dcterms:contributor "Francesca Lønstad Bleken, SINTEF, NO"@en ,
-                                                               "Gerhard Goldbeck, Goldbeck Consulting Ltd (UK)" ,
-                                                               "Jesper Friis, SINTEF, NO" ,
-                                                               "Michael Noeske, FRAUNHOFER IFAM, DE"@en ;
-                                           dcterms:creator "Emanuele Ghedini, University of Bologna, IT" ;
+                                                               "Michael Noeske, FRAUNHOFER IFAM, DE"@en ,
+                                                               "Gerhard Goldbeck, Goldbeck Consulting Ltd (UK)"@en ,
+                                                               "Jesper Friis, SINTEF, NO"@en ;
+                                           dcterms:creator "Emanuele Ghedini, University of Bologna, IT"@en ;
                                            dcterms:license "https://creativecommons.org/licenses/by/4.0/legalcode" ;
-                                           dcterms:publisher "EMMC ASBL" ;
+                                           dcterms:publisher "EMMC ASBL"@en ;
                                            dcterms:title "Distinctional"@en ;
                                            rdfs:comment """Contacts:
 Gerhard Goldbeck
@@ -31,6 +31,19 @@ email: emanuele.ghedini@unibo.it"""@en ,
                                                         "The EMMO requires HermiT reasoner plugin in order to visualize all inferences and class hierarchy (ctrl+R hotkey in Protege)."@en ;
                                            owl:versionInfo "1.0.0-beta5" .
 
+#################################################################
+#    Object Properties
+#################################################################
+
+###  http://emmo.info/emmo/perspectives/data#EMMO_b19aacfc_5f73_4c33_9456_469c1e89a53e
+:EMMO_b19aacfc_5f73_4c33_9456_469c1e89a53e rdf:type owl:ObjectProperty ;
+                                           rdfs:subPropertyOf :EMMO_55354438_7000_4284_b1b9_59d60c2261b9 ;
+                                           rdfs:domain :EMMO_194e367c_9783_4bf5_96d0_9ad597d48d9a ;
+                                           rdfs:range :EMMO_50d6236a_7667_4883_8ae1_9bb5d190423a ;
+                                           :EMMO_967080e5_2f42_4eb2_a3a9_c58143e835f9 "Relates a dataset to its datum."@en ;
+                                           skos:prefLabel "hasDatum"@en .
+
+
 #################################################################
 #    Data properties
 #################################################################