diff --git a/schemas/IBM.json b/schemas/IBM.json
index 4078475..35a5c62 100644
--- a/schemas/IBM.json
+++ b/schemas/IBM.json
@@ -48,6 +48,50 @@
                 "I2CAddress",
                 "NamedPresenceGpio"
             ]
+        },
+        "IBMCompatibleSystem": {
+            "title": "System compatibility",
+            "description": [
+                "Devicetree-like compatibility strings for systems, where a",
+                "'system' is roughly defined as the combination of a chassis and a",
+                "mainboard.",
+                "",
+                "The strings should be used by applications to match the",
+                "entity with entries or configuration in a hardware database.",
+                "Strings appear in the list from most specific to most",
+                "general.  This allows an entity to express compatibility with",
+                "a family of similar devices, in turn allowing an application",
+                "to match a variety of devices with a single IBMCompatibleSystem",
+                "entry.",
+                "",
+                "The recommended entry format is 'manufacturer,model' where",
+                "the manufacturer is a string describing the name of the",
+                "manufacturer and model specifies the model number."
+
+            ],
+            "type": "object",
+            "properties": {
+                "Name": {
+                    "type": "string"
+                },
+                "Type": {
+                    "enum": [
+                        "IBMCompatibleSystem"
+                    ]
+                },
+                "Names": {
+                    "type": "array",
+                    "items": {
+                        "enum": [
+                        ]
+                    }
+                }
+            },
+            "required": [
+                "Name",
+                "Type",
+                "Names"
+            ]
         }
     }
 }
diff --git a/schemas/global.json b/schemas/global.json
index 88db2bb..9385ffc 100644
--- a/schemas/global.json
+++ b/schemas/global.json
@@ -9,6 +9,9 @@
             ],
             "oneOf": [
                 {
+                    "$ref": "IBM.json#/definitions/IBMCompatibleSystem"
+                },
+                {
                     "$ref": "IBM.json#/definitions/IBMCFFPSConnector"
                 },
                 {