diff --git a/TrainingMaterial/jsonld/TrainingMaterial_v1.1-DRAFT.json b/TrainingMaterial/jsonld/TrainingMaterial_v1.1-DRAFT.json
index 8e96dbb..36af06d 100644
--- a/TrainingMaterial/jsonld/TrainingMaterial_v1.1-DRAFT.json
+++ b/TrainingMaterial/jsonld/TrainingMaterial_v1.1-DRAFT.json
@@ -513,7 +513,7 @@
                                 }
                             }
                         ],
-                        "description": "URL of additional sources for the dataset",
+                        "description": "URL of a reference Web page that unambiguously indicates the item's identity. E.g. the URL of the item's Wikipedia page, Wikidata entry, or official website.",
                         "owl:cardinality": "many"
                     }
                 },