aspect JastAddJCore {

	/* 
	 * The AST node corresponding to the root node of the project AST
	 * need to set isProjectAST() to true.
	 */
	eq Program.isProjectAST() = true;	
	
	 
	/* 
	 * CompilationUnit corresponds to a file and should be used for look up
	 */
	eq CompilationUnit.hasLookupKey() = true;
	eq CompilationUnit.lookupKey() = pathName();	
	eq CompilationUnit.lookupChildAST(String key) = key.equals(lookupKey()) ? this : null;
}