diff --git a/variables.xml b/variables.xml
index 1c187bf..787746e 100644
--- a/variables.xml
+++ b/variables.xml
@@ -1,4 +1,4 @@
 <var>
-    <creation-time>2022-01-13 09:24</creation-time>
-    <document-version>1.13.0</document-version>
+    <creation-time>2022-04-14 11:04</creation-time>
+    <document-version>1.13.1</document-version>
 </var>
diff --git a/vscp_module_description_file.md b/vscp_module_description_file.md
index e1bc6c4..b22a19f 100644
--- a/vscp_module_description_file.md
+++ b/vscp_module_description_file.md
@@ -69,6 +69,7 @@ Every module should have an initial block that describes the module. This block
 ```xml
 <vscp>
 	<module>
+    <level>1/2</level>
     <name>aaaaaaaa</name>
 		<model>bbbbb</model>    
 		<version>cccccc</version>
@@ -79,6 +80,10 @@ Every module should have an initial block that describes the module. This block
 		<buffersize>8</buffersize> 
 </module>    
 ```
+
+#### level
+VSCP level of protocol this module works with. Defaults to 1 if not present.
+
 #### name
 Name is the name of the module. A unique describing name is recommended. This name will be translated to lower case and is used as the name of the module when referring to it in software.
 
@@ -1520,6 +1525,7 @@ Every module should have an initial block that describes the module. This block
 ```json
 {
   "module": {
+    "level": "1/2",
     "name": "Simple B test",
     "model": "Simple B model",
     "version": "B",
@@ -1611,6 +1617,8 @@ Every module should have an initial block that describes the module. This block
 }
 ```
 
+#### level
+Level of the VSCP protocol this module works with. Can be 1 or 2 and defaults to 1 if not present.
 
 #### name
 Name is the name of the module. A unique describing name is recommended. This name will be translated to lower case and is used as the name of the module when referring to it in software.
diff --git a/vscp_specification_history.md b/vscp_specification_history.md
index caa041a..251285c 100644
--- a/vscp_specification_history.md
+++ b/vscp_specification_history.md
@@ -2,6 +2,7 @@
 
  | Date       | By   | Description |
  | ---------- | ---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+ | 2022-04-14 | AKHE | VSCP protocol level added to manufacturer info. Default to 1 |
  | 2022-01-21 | AKHE | Added proper description of JSON formatted MDF files. |
  | 2022-01-17 | AKHE | Two new standard register positions has been added for 'firmware code' |
  | 2022-01-13 | AKHE | Updated MDF info. 'abstraction' has been changed to 'remotevar'. 'abstraction' can still be used. 'name' attribute is not language dependent anymore. |