Resolve "Make specification langauge more concise"

Closes #33 (closed)

ragconnect.tests/src/test/01-input/singleListVariant/Test.connect

@@ -7,22 +7,22 @@ send SenderRoot.T_TwoChildren ;
 send SenderRoot.T_OneOfEach ;
 send SenderRoot.T_Abstract ;
 
-receive ReceiverRoot.T_Empty ;
-receive ReceiverRoot.T_Token ;
-receive ReceiverRoot.T_OneChild ;
-receive ReceiverRoot.T_OneOpt ;
-receive ReceiverRoot.T_OneList ;
-receive ReceiverRoot.T_TwoChildren ;
-receive ReceiverRoot.T_OneOfEach ;
-receive ReceiverRoot.T_Abstract ;
+receive indexed ReceiverRoot.T_Empty ;
+receive indexed ReceiverRoot.T_Token ;
+receive indexed ReceiverRoot.T_OneChild ;
+receive indexed ReceiverRoot.T_OneOpt ;
+receive indexed ReceiverRoot.T_OneList ;
+receive indexed ReceiverRoot.T_TwoChildren ;
+receive indexed ReceiverRoot.T_OneOfEach ;
+receive indexed ReceiverRoot.T_Abstract ;
 
-receive ReceiverRoot.MyEmpty ;
+receive indexed ReceiverRoot.MyEmpty ;
 
-receive with add ReceiverRoot.EmptyWithAdd ;
-receive with add ReceiverRoot.TokenWithAdd ;
-receive with add ReceiverRoot.OneChildWithAdd ;
-receive with add ReceiverRoot.OneOptWithAdd ;
-receive with add ReceiverRoot.OneListWithAdd ;
-receive with add ReceiverRoot.TwoChildrenWithAdd ;
-receive with add ReceiverRoot.OneOfEachWithAdd ;
-receive with add ReceiverRoot.AbstractWithAdd ;
+receive indexed with add ReceiverRoot.EmptyWithAdd ;
+receive indexed with add ReceiverRoot.TokenWithAdd ;
+receive indexed with add ReceiverRoot.OneChildWithAdd ;
+receive indexed with add ReceiverRoot.OneOptWithAdd ;
+receive indexed with add ReceiverRoot.OneListWithAdd ;
+receive indexed with add ReceiverRoot.TwoChildrenWithAdd ;
+receive indexed with add ReceiverRoot.OneOfEachWithAdd ;
+receive indexed with add ReceiverRoot.AbstractWithAdd ;