diff --git a/index.js b/index.js
index 21cd6bd..85fce29 100644
--- a/index.js
+++ b/index.js
@@ -21,9 +21,11 @@ const companies = require(pathForJson('company_ids'));
 const services = require(pathForJson('service_uuids'));
 const characteristics = require(pathForJson('characteristic_uuids'));
 const descriptors = require(pathForJson('descriptor_uuids'));
+const appearances = require(pathForJson('gap_appearance'));
 
 const companySchema = require(pathForJson('company_schema'));
 const attributeSchema = require(pathForJson('attribute_schema'));
+const appearanceSchema = require(pathForJson('appearance_schema'));
 
 module.exports = {
     version,
@@ -31,10 +33,12 @@ module.exports = {
     services,
     characteristics,
     descriptors,
+    appearances,
     schemas: {
         companies: companySchema,
         services: attributeSchema,
         characteristics: attributeSchema,
         descriptors: attributeSchema,
+        appearances: appearanceSchema
     }
 };
diff --git a/v1/appearance_schema.json b/v1/appearance_schema.json
new file mode 100644
index 0000000..8b9cb4c
--- /dev/null
+++ b/v1/appearance_schema.json
@@ -0,0 +1,27 @@
+{
+  "type": "array",
+  "items": {
+    "type": "object",
+    "properties": {
+      "category": {
+        "type": "string",
+		"pattern": "^[0-9A-Fa-f]+$"
+      },
+      "name": {
+        "type": "string"
+      },
+      "subcategory": {
+        "type": "array",
+        "items": {
+          "type": "object",
+          "properties": {
+            "value": { "type": "string" },
+            "name": { "type": "string" }
+          },
+          "required": ["value", "name"]
+        }
+      }
+    },
+    "required": ["category", "name"]
+  }
+}
diff --git a/verify.js b/verify.js
index 6600169..217f8c5 100644
--- a/verify.js
+++ b/verify.js
@@ -22,6 +22,14 @@ const noDuplicates = Object.keys(db)
       let companyCodes = db[list].map(company => company.code);
       numberOfItems = companyCodes.length;
       numberOfUniques = (new Set(companyCodes)).size;
+	} else if (list == 'appearances') {
+        let appearances = db[list].map(appearance => appearance.category);
+        numberOfItems = appearances.length;
+		numberOfUniques = (new Set(appearances)).size;
+        if (numberOfItems != numberOfUniques) {
+          console.error(`Failed to verify '${list}'. Found '${numberOfItems - numberOfUniques}' duplicate items.`);
+          return false;
+        }
     } else {
       // GATT Attributes
       let uuids = db[list].map(gatt => gatt.uuid);