import edu.neu.ccs.demeter.dj.*;
Container =			"(" <contents> Item_List <capacity> Capacity ")" extends Item.

Item :			Container
			| Simple			.

Simple =			<name> ItemName <w> Weight extends Item.

ItemName =			<i> Ident.

Capacity =			<i> int.

Weight =			<i> int.

SummingVisitorDJ =			<total> int extends Visitor.

CountingVisitorDJ =			<total> int extends Visitor.

AverageVisitorDJ =			<cV> CountingVisitorDJ <sV> SummingVisitorDJ <current> float extends Visitor.

ResultVisitorDJ =			<aV> AverageVisitorDJ extends Visitor.

Main =			.

notparsed visitor PrintVisitor =			<indent> int <needSpace> boolean extends UniversalVisitor.

notparsed visitor CopyVisitor =			<copy> derived Object extends UniversalVisitor.

notparsed visitor SubgraphVisitor =			<is_equal> boolean init {{ true }} extends UniversalVisitor.

notparsed visitor EqualVisitor =			<is_equal> boolean init {{ true }} extends UniversalVisitor.

notparsed visitor DisplayVisitor =			<indent> int extends UniversalVisitor.

notparsed visitor TraceVisitor =			<indent> int extends UniversalVisitor.

notparsed visitor UniversalVisitor :						.
			
			Item_List =			[ <first> Nonempty_Item_List].
			
			Nonempty_Item_List =			<it> Item [ <next> Nonempty_Item_List].