ModuleDeclaration:
	'Module' name= QualifiedName id=INT
;
PackageDeclaration:
  'package' name = [ModuleDeclaration | QualifiedName]   
;

Module Account 121

Module Product 122

package Xxx

To enable support for this kind of global scoping in Xtext, a DefaultGlobalScopeProvider has to be bound to the IGlobalScopeProvider interface. By default Xtext leverages the class path mechanism since it is well designed and already understood by most of our users. The available tooling provided by JDT and PDE to configure the class path adds even more value. However, it is just a default: you can reuse the infrastructure without using Java and be independent from the JDT.

def scope_ModuleDeclaration(PackageDeclaration context, EReference ref)
{
   //parser all jar and build scope
}