diff --git a/schema/system/database_source.json b/schema/system/database_source.json
index 727fa0844..8435d212a 100644
--- a/schema/system/database_source.json
+++ b/schema/system/database_source.json
@@ -10,16 +10,26 @@
             "type": "string"
         },
         "source": {
-            "description": "Third party source name.",
+            "description": "Third party source name, e.g. materials project, 2dmatpedia, ICSD, etc.",
             "type": "string"
         },
         "origin": {
             "description": "A flag that is true when material is initially imported from a third party * (as opposed to being independently designed from scratch).",
-            "type": "boolean"
+            "type": "boolean",
+            "comment": "Deprecated. To be removed."
         },
         "data": {
-            "description": "Original response from external source",
+            "description": "Original response from external source.",
             "type": "object"
+        },
+        "doi":{
+            "description": "Digital Object Identifier, e.g. 10.1088/0953-8984/25/10/105506",
+            "type": "string"
+        },
+        "url": {
+            "description": "The URL of the original record, e.g. https://next-gen.materialsproject.org/materials/mp-48",
+            "type": "string",
+            "comment": "ToDo: update to use URI type per https://json-schema.org/understanding-json-schema/reference/string#resource-identifiers"
         }
     },
     "required": [