lib/properties/executionhandler.rng in cpee-2.1.56 vs lib/properties/executionhandler.rng in cpee-2.1.57

@@ -1,9 +1,9 @@
 <grammar xmlns="http://relaxng.org/ns/structure/1.0" datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
   <define name="executionhandler">
     <element name="executionhandler" ns="http://cpee.org/ns/properties/2.0">
       <data type="string">
-        <param name="pattern">[a-zA-Z]+</param>
+        <param name="pattern">[a-z][a-zA-Z]*</param>
       </data>
     </element>
   </define>
 </grammar>