diff --git a/docs/reference/context/device.schema.json b/docs/reference/context/device.schema.json
index 75ceb1a24b..9fe7f81eb1 100644
--- a/docs/reference/context/device.schema.json
+++ b/docs/reference/context/device.schema.json
@@ -73,6 +73,15 @@
                     "title": "Color Depth",
                     "type": "integer",
                     "description": "The number of colors the display is able to represent."
+                },
+                "xdm:screenOrientation": {
+                    "title": "Screen Orientation",
+                    "type": "string",
+                    "description": "The current screen orientation (\"portait\" or \"landscape\")",
+                    "meta:enum": {
+                        "portrait": "Portrait",
+                        "landscape": "Landscape"
+                    }
                 }
             }
         }
@@ -96,7 +105,8 @@
             "xdm:modelNumber": "A1586",
             "xdm:screenHeight": 667,
             "xdm:screenWidth": 375,
-            "xdm:colorDepth": 16777216
+            "xdm:colorDepth": 16777216,
+            "xdm:screenOrientation": "portrait"
         }
     ]
 }
\ No newline at end of file
diff --git a/docs/reference/context/device.schema.md b/docs/reference/context/device.schema.md
index 219701fb2e..468ae0d489 100644
--- a/docs/reference/context/device.schema.md
+++ b/docs/reference/context/device.schema.md
@@ -27,7 +27,8 @@ An identified device that is an application or browser instance that is trackabl
   "xdm:modelNumber": "A1586",
   "xdm:screenHeight": 667,
   "xdm:screenWidth": 375,
-  "xdm:colorDepth": 16777216
+  "xdm:colorDepth": 16777216,
+  "xdm:screenOrientation": "portrait"
 }
 ```
 
@@ -40,6 +41,7 @@ An identified device that is an application or browser instance that is trackabl
 | [xdm:model](#xdmmodel) | `string` | Optional | Device (this schema) |
 | [xdm:modelNumber](#xdmmodelnumber) | `string` | Optional | Device (this schema) |
 | [xdm:screenHeight](#xdmscreenheight) | `integer` | Optional | Device (this schema) |
+| [xdm:screenOrientation](#xdmscreenorientation) | `string` | Optional | Device (this schema) |
 | [xdm:screenWidth](#xdmscreenwidth) | `integer` | Optional | Device (this schema) |
 | [xdm:type](#xdmtype) | `string` | Optional | Device (this schema) |
 | [xdm:typeID](#xdmtypeid) | `string` | Optional | Device (this schema) |
@@ -146,6 +148,32 @@ The number of veritcal pixels of the device's active display in its default orie
 
 
 
+## xdm:screenOrientation
+### Screen Orientation
+
+The current screen orientation ("portait" or "landscape")
+
+`xdm:screenOrientation`
+* is optional
+* type: `string`
+* defined in this schema
+
+### xdm:screenOrientation Type
+
+
+`string`
+
+
+
+### xdm:screenOrientation Known Values
+| Value | Description |
+|-------|-------------|
+| `portrait` | Portrait |
+| `landscape` | Landscape |
+
+
+
+
 ## xdm:screenWidth
 ### Screen Width
 
diff --git a/docs/reference/context/experienceevent-environment-details.schema.json b/docs/reference/context/experienceevent-environment-details.schema.json
index fddd254f89..ef58db08ba 100644
--- a/docs/reference/context/experienceevent-environment-details.schema.json
+++ b/docs/reference/context/experienceevent-environment-details.schema.json
@@ -65,6 +65,18 @@
                 "xdm:operatingSystemVersion": "10.13",
                 "xdm:connectionType": "cable"
             },
+            "xdm:device": {
+                "xdm:typeID": "TypeIdentifier-111",
+                "xdm:typeIDService": "https://ns.adobe.com/xdm/external/deviceatlas",
+                "xdm:type": "mobile",
+                "xdm:manufacturer": "Apple",
+                "xdm:model": "iPhone 6",
+                "xdm:modelNumber": "A1586",
+                "xdm:screenHeight": 667,
+                "xdm:screenWidth": 375,
+                "xdm:colorDepth": 16777216,
+                "xdm:screenOrientation": "portrait"
+            },
             "xdm:placeContext": {
                 "xdm:localTime": "2017-09-26T15:52:25+13:00",
                 "xdm:geo": {
diff --git a/docs/reference/context/experienceevent-environment-details.schema.md b/docs/reference/context/experienceevent-environment-details.schema.md
index eec3c74bf0..467859d64e 100644
--- a/docs/reference/context/experienceevent-environment-details.schema.md
+++ b/docs/reference/context/experienceevent-environment-details.schema.md
@@ -40,6 +40,18 @@ ExperienceEvent Environment Details.
     "xdm:operatingSystemVersion": "10.13",
     "xdm:connectionType": "cable"
   },
+  "xdm:device": {
+    "xdm:typeID": "TypeIdentifier-111",
+    "xdm:typeIDService": "https://ns.adobe.com/xdm/external/deviceatlas",
+    "xdm:type": "mobile",
+    "xdm:manufacturer": "Apple",
+    "xdm:model": "iPhone 6",
+    "xdm:modelNumber": "A1586",
+    "xdm:screenHeight": 667,
+    "xdm:screenWidth": 375,
+    "xdm:colorDepth": 16777216,
+    "xdm:screenOrientation": "portrait"
+  },
   "xdm:placeContext": {
     "xdm:localTime": "2017-09-26T15:52:25+13:00",
     "xdm:geo": {
diff --git a/schemas/context/device.example.1.json b/schemas/context/device.example.1.json
index 193086e1e1..c09119fdd0 100644
--- a/schemas/context/device.example.1.json
+++ b/schemas/context/device.example.1.json
@@ -7,5 +7,6 @@
   "xdm:modelNumber": "A1586",
   "xdm:screenHeight": 667,
   "xdm:screenWidth": 375,
-  "xdm:colorDepth": 16777216
+  "xdm:colorDepth": 16777216,
+  "xdm:screenOrientation": "portrait"
 }
diff --git a/schemas/context/device.schema.json b/schemas/context/device.schema.json
index 996d4d3263..ab8f691fdf 100644
--- a/schemas/context/device.schema.json
+++ b/schemas/context/device.schema.json
@@ -82,6 +82,16 @@
           "type": "integer",
           "description":
             "The number of colors the display is able to represent."
+        },
+        "xdm:screenOrientation": {
+          "title": "Screen Orientation",
+          "type": "string",
+          "description":
+            "The current screen orientation (\"portait\" or \"landscape\")",
+          "meta:enum": {
+            "portrait": "Portrait",
+            "landscape": "Landscape"
+          }
         }
       }
     }