diff --git a/schema/Entity.json b/schema/Entity.json
index a0c4acf90d2f7af3344ffa7a97bba553b08af414..621012434669a60247f45559021978a7bdbc2b34 100644
--- a/schema/Entity.json
+++ b/schema/Entity.json
@@ -4,6 +4,12 @@
   "title": "NGSI-LD Entity",
   "description": "NGSI-LD Entity",
   "definitions": {
+    "EntityType": {
+      "type": "string",
+      "pattern": "^(\\d|[a-zA-Z]|_)+$",
+      "minLength": 1,
+      "description": "NGSI Entity type"
+    },
     "datasetId": {
       "type": "string",
       "format": "uri"
@@ -144,9 +150,7 @@
       "format": "uri"
     },
     "type": {
-      "type": "string",
-      "description": "NGSI Entity type",
-      "minLength": 1
+      "$ref": "#/definitions/EntityType"
     },
     "@context": {
       "$ref": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/common.json#/definitions/LdContext"
diff --git a/schema/EntityTemporal.json b/schema/EntityTemporal.json
index f362b4e9c6dc0cc394e89eb236557ed17c9274c1..b34b50c14ef426518b33fe6bad097ba4a0a4af39 100644
--- a/schema/EntityTemporal.json
+++ b/schema/EntityTemporal.json
@@ -10,9 +10,7 @@
       "format": "uri"
     },
     "type": {
-      "type": "string",
-      "description": "NGSI Entity type",
-      "minLength": 1
+      "$ref": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/Entity.json#/definitions/EntityType"
     },
     "@context": {
       "$ref": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/common.json#/definitions/LdContext"
diff --git a/schema/Entity_keyValues.json b/schema/Entity_keyValues.json
new file mode 100644
index 0000000000000000000000000000000000000000..e207b586e2336715f1d6fd0269737c2b631c04e8
--- /dev/null
+++ b/schema/Entity_keyValues.json
@@ -0,0 +1,51 @@
+{
+  "$schema": "http://json-schema.org/schema#",
+  "id": "https://uri.etsi.org/ngsi-ld/schema/Entity_keyValues.json",
+  "title": "NGSI-LD Entity Key Values",
+  "description": "NGSI-LD Entity Simplified Representation",
+  "type": "object",
+  "properties": {
+    "id": {
+      "type": "string",
+      "format": "uri"
+    },
+    "type": {
+      "$ref": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/Entity.json#/definitions/EntityType"
+    },
+    "@context": {
+      "$ref": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/common.json#/definitions/LdContext"
+    },
+    "location": {
+      "$ref": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/geometry-schema.json#"
+    },
+    "observationSpace": {
+      "$ref": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/geometry-schema.json#"
+    },
+    "operationSpace": {
+      "$ref": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/geometry-schema.json#"
+    },
+    "createdAt": {
+      "$ref": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/common.json#/definitions/createdAt"
+    },
+    "modifiedAt": {
+      "$ref": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/common.json#/definitions/modifiedAt"
+    }
+  },
+  "required": [
+    "type",
+    "id"
+  ],
+  "additionalProperties": {
+    "type": [
+      "string",
+      "number",
+      "boolean",
+      "array",
+      "object"
+    ]
+  },
+  "propertyNames": {
+    "type": "string",
+    "pattern": "^((\\d|[a-zA-Z]|_)+(#\\d+)?)$"
+  }
+}
diff --git a/scripts/validate_schema.sh b/scripts/validate_schema.sh
index f5353b2e5259913d779f8fdeeade19a549af4e0f..c41c8110da56bce937540566576161e1ede1bcb8 100755
--- a/scripts/validate_schema.sh
+++ b/scripts/validate_schema.sh
@@ -18,3 +18,4 @@ ajv compile -s $SCHEMAS/BatchOperationResult.json -r $SCHEMAS/common.json
 
 ajv compile -s $SCHEMAS/UpdateResult.json
 
+ajv compile -s $SCHEMAS/Entity_keyValues.json -r $SCHEMAS/common.json -r $SCHEMAS/geometry-schema.json -r $SCHEMAS/Entity.json