diff --git a/Source/DTDLv2/RealEstateCore/LogicalDevice/LogicalDevice.json b/Source/DTDLv2/RealEstateCore/LogicalDevice/LogicalDevice.json
new file mode 100644
index 000000000..24e6fc051
--- /dev/null
+++ b/Source/DTDLv2/RealEstateCore/LogicalDevice/LogicalDevice.json
@@ -0,0 +1,99 @@
+{
+  "@id": "dtmi:org:w3id:rec:LogicalDevice;1",
+  "@type": "Interface",
+  "contents": [
+    {
+      "@type": "Relationship",
+      "displayName": {
+        "en": "located in"
+      },
+      "name": "locatedIn",
+      "target": "dtmi:org:w3id:rec:Space;1",
+      "writable": true
+    },
+    {
+      "@type": "Relationship",
+      "displayName": {
+        "en": "served by"
+      },
+      "name": "servedBy",
+      "target": "dtmi:org:w3id:rec:LogicalDevice;1",
+      "maxMultiplicity": 1,
+      "writable": true
+    },
+    {
+      "@type": "Relationship",
+      "displayName": {
+        "en": "serves"
+      },
+      "name": "serves",
+      "target": "dtmi:org:w3id:rec:LogicalDevice;1",
+      "writable": true
+    },
+    {
+      "@type": "Relationship",
+      "displayName": {
+        "en": "has point"
+      },
+      "name": "hasPoint",
+      "target": "dtmi:org:w3id:rec:GatewayConnectionParameter;1",
+      "writable": true
+    },
+    {
+      "@type": "Property",
+      "displayName": {
+        "en": "Custom Tags"
+      },
+      "name": "customTags",
+      "schema": {
+        "@type": "Map",
+        "mapKey": {
+          "name": "tagName",
+          "schema": "string"
+        },
+        "mapValue": {
+          "name": "tagValue",
+          "schema": "boolean"
+        }
+      },
+      "writable": true
+    },
+    {
+      "@type": "Property",
+      "displayName": {
+        "en": "Identifiers"
+      },
+      "name": "identifiers",
+      "schema": {
+        "@type": "Map",
+        "mapKey": {
+          "name": "namespace",
+          "schema": "string"
+        },
+        "mapValue": {
+          "name": "identifier",
+          "schema": "string"
+        }
+      },
+      "writable": true
+    },
+    {
+      "@type": "Property",
+      "displayName": {
+        "en": "name"
+      },
+      "name": "name",
+      "schema": "string",
+      "writable": true
+    }
+  ],
+  "description": {
+    "en": "Logical Device."
+  },
+  "displayName": {
+    "en": "LogicalDevice"
+  },
+  "@context": [
+    "dtmi:dtdl:context;2"
+  ]
+}
\ No newline at end of file
diff --git a/Source/DTDLv2/RealEstateCore/LogicalDevice/LogicalServer/LogicalServer.json b/Source/DTDLv2/RealEstateCore/LogicalDevice/LogicalServer/LogicalServer.json
new file mode 100644
index 000000000..f7b5bb1bc
--- /dev/null
+++ b/Source/DTDLv2/RealEstateCore/LogicalDevice/LogicalServer/LogicalServer.json
@@ -0,0 +1,25 @@
+{
+  "@id": "dtmi:org:w3id:rec:LogicalServer;1",
+  "@type": "Interface",
+  "contents": [
+    {
+      "@type": "Property",
+      "displayName": {
+        "en": "IP address"
+      },
+      "name": "IPAddress",
+      "schema": "string",
+      "writable": true
+    }
+  ],
+  "description": {
+    "en": "Logical Server."
+  },
+  "displayName": {
+    "en": "LogicalServer"
+  },
+  "extends": "dtmi:org:w3id:rec:LogicalDevice;1",
+  "@context": [
+    "dtmi:dtdl:context;2"
+  ]
+}
\ No newline at end of file
diff --git a/Source/DTDLv2/RealEstateCore/Point/Parameter/Gateway-/GatewayConnectionParameter.json b/Source/DTDLv2/RealEstateCore/Point/Parameter/Gateway-/GatewayConnectionParameter.json
index 47d10f369..c57a3e729 100644
--- a/Source/DTDLv2/RealEstateCore/Point/Parameter/Gateway-/GatewayConnectionParameter.json
+++ b/Source/DTDLv2/RealEstateCore/Point/Parameter/Gateway-/GatewayConnectionParameter.json
@@ -3,6 +3,17 @@
     "@type": "Interface",
     "displayName": "Gateway Connection Parameter",
     "extends": "dtmi:org:brickschema:schema:Brick:Parameter;1",
+    "contents": [
+        {
+            "@type": "Property",
+            "displayName": {
+                "en": "gateway type"
+            },
+            "name": "gatewayType",
+            "schema": "string",
+            "writable": true
+        }
+    ],
     "@context": [
         "dtmi:dtdl:context;2"
     ]