diff --git a/schema/data.yml b/schema/data.yml
new file mode 100644
index 0000000..38b8cb8
--- /dev/null
+++ b/schema/data.yml
@@ -0,0 +1,103 @@
+---
+main:
+  kind: OneOf
+  values:
+    - kind: ref
+      value: request
+    - kind: ref
+      value: response
+    - kind: list
+      value:
+        kind: ref
+        value: request
+request:
+  kind: dict
+  fields:
+    - name: jsonrpc
+      required: true
+      value:
+        kind: string
+        value: "3.0"
+    - name: auth
+      required: false
+      value:
+        kind: ref
+        value: auth
+    - name: method
+      required: true
+      value:
+        kind: string
+    - name: params
+      required: false
+      value:
+        kind: OneOf
+        values:
+          - kind: dict
+          - kind: list
+          - kind: string
+          - kind: integer
+response:
+  kind: OneOf
+  values:
+    - kind: result
+    - kind: error
+result:
+  kind: dict
+  fields:
+    - name: jsonrpc
+      required: true
+      value:
+        kind: string
+        value: "3.0"
+    - name: result
+      required: true
+      value:
+        kind: string
+    - name: params
+      required: false
+      value:
+        kind: OneOf
+        values:
+          - kind: dict
+          - kind: list
+          - kind: string
+          - kind: integer
+error:
+  kind: dict
+  fields:
+    - name: jsonrpc
+      required: true
+      value:
+        kind: string
+        value: "3.0"
+    - name: error
+      required: true
+      value:
+        kind: dict
+    - name: id
+      required: true
+      value:
+        kind: OneOf
+        values:
+          - kind: string
+          - kind: integer
+auth:
+  kind: OneOf
+  values:
+    - kind: dict
+      fields:
+        - name: kind
+          required: true
+          value:
+            kind: string
+            value: "user"
+        - name: name
+          required: true
+          value:
+            kind: string
+            value: "admin"
+        - name: password
+          required: true
+          value:
+            kind: string
+            value: "admin2"