diff --git a/schema/ContextSourceNotification.json b/schema/ContextSourceNotification.json
new file mode 100644
index 0000000000000000000000000000000000000000..cd289c23e05781f1ca6d73f10e009f5ff6f06e0b
--- /dev/null
+++ b/schema/ContextSourceNotification.json
@@ -0,0 +1,51 @@
+{
+  "$schema": "http://json-schema.org/schema#",
+  "id": "https://uri.etsi.org/ngsi-ld/schema/ContextSourceNotification.json",
+  "title": "NGSI-LD Context Source Notification",
+  "description": "NGSI-LD Context Source Notification",
+  "type": "object",
+  "properties": {
+    "id": {
+      "type": "string",
+      "format": "uri"
+    },
+    "type": {
+      "type": "string",
+      "const": "ContextSourceNotification"
+    },
+    "subscriptionId": {
+      "type": "string",
+      "format": "uri"
+    },
+    "@context": {
+      "$ref": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/common.json#/definitions/LdContext"
+    },
+    "notifiedAt": {
+      "type": "string",
+      "format": "date-time"
+    },
+    "data": {
+      "type": "array",
+      "items": {
+        "$ref": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/ContextSourceRegistration.json#"
+      },
+      "minItems": 1
+    },
+    "triggerReason": {
+      "type": "string",
+      "enum": [
+        "newlyMatching",
+        "updated",
+        "noLongerMatching"
+      ]
+    }
+  },
+  "required": [
+    "id",
+    "type",
+    "subscriptionId",
+    "notifiedAt",
+    "data",
+    "triggerReason"
+  ]
+}
diff --git a/schema/ContextSourceRegistration.json b/schema/ContextSourceRegistration.json
index c4161e6fe83db1114a15469ac66b807cf575ee3c..38379cd81809e071657c020656bfecf686b9bce1 100644
--- a/schema/ContextSourceRegistration.json
+++ b/schema/ContextSourceRegistration.json
@@ -1,6 +1,6 @@
 {
   "$schema": "http://json-schema.org/schema#",
-  "id": "https://uri.etsi.org/ngsi-ld/schema/ContextSourceRegistration.json",
+  "id": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/ContextSourceRegistration.json",
   "title": "NGSI-LD Context Source Registration",
   "description": "NGSI-LD Context Source Registration",
   "definitions": {
diff --git a/schema/Notification.json b/schema/Notification.json
index 4a848620f2b4f6d0a155c8f97f9cad91145df2f4..d73ed76b283b63c36ca5922c5ef805163f159106 100644
--- a/schema/Notification.json
+++ b/schema/Notification.json
@@ -13,6 +13,10 @@
       "type": "string",
       "const": "Notification"
     },
+    "subscriptionId": {
+      "type": "string",
+      "format": "uri"
+    },
     "@context": {
       "$ref": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/common.json#/definitions/LdContext"
     },
diff --git a/scripts/validate_schema.sh b/scripts/validate_schema.sh
index 1483f513a6ed8fa836fc66324119f13b6d754ecf..2f4cc973646677a4450c638b5107526bc2614a65 100755
--- a/scripts/validate_schema.sh
+++ b/scripts/validate_schema.sh
@@ -9,3 +9,6 @@ ajv compile -s $SCHEMAS/EntityTemporal.json -r $SCHEMAS/common.json -r $SCHEMAS/
 ajv compile -s $SCHEMAS/ContextSourceRegistration.json -r $SCHEMAS/common.json -r $SCHEMAS/geometry-schema.json
 
 ajv compile -s $SCHEMAS/Notification.json -r $SCHEMAS/common.json -r $SCHEMAS/geometry-schema.json -r $SCHEMAS/Entity.json
+
+ajv compile -s $SCHEMAS/ContextSourceNotification.json -r $SCHEMAS/common.json -r $SCHEMAS/geometry-schema.json -r $SCHEMAS/ContextSourceRegistration.json
+