You have
(GenericElements?,Person?,Location?)*,Person,(GenericElements?,Person?,Location?)*
which is ambiguous as you can't tell, the first time you get a Person,
whether you are still in the first ()* clause or whether it is your
mandatory middle Person.
You can re-write it as
(GenericElements,Location)*,Person,(GenericElements,Person,Location)*
Which isn't ambiguous.
David
________________________________________________________________________
This e-mail has been scanned for all viruses by Star Internet. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________
