--- a/svghmi/hmi_tree.ysl2	Tue Mar 17 14:01:37 2020 +0100
+++ b/svghmi/hmi_tree.ysl2	Tue Mar 17 14:11:54 2020 +0100
@@ -52,6 +52,17 @@
     }
 }
 
+//  Parses:
+//  "HMI:WidgetType:param1:param2@path1@path2"
+//
+//  Into:
+//  widget type="WidgetType" {
+//      arg value="param1";
+//      arg value="param2";
+//      path value="path1";
+//      path value="path2";
+//  }
+//
 def "func:parselabel" {
     param "label";
     const "description", "substring-after($label,'HMI:')";