diff --git a/schema.xsd b/schema.xsd
index 4d18ba0..16ca5c3 100644
--- a/schema.xsd
+++ b/schema.xsd
@@ -162,6 +162,7 @@
         <xsd:attribute type="xsd:int" name="value"/>
         <xsd:attribute type="xsd:int" name="size"/>
         <xsd:attribute type="xsd:string" name="type"/>
+        <xsd:attribute type="xsd:string" name="deviceType"/>
     </xsd:complexType>
 
     <xsd:complexType name="BaseCollection">