12. The method of claim 1 , wherein at least one of said plurality of contextual relations is a conditional contextual relation defining at least one required instance.
12. The method of claim 1 , wherein at least one of said plurality of contextual relations is a conditional contextual relation defining at least one required instance. 13. The method of claim 12 , wherein at least one of said plurality of functionality modules is configured for using said at least one required instance for obtaining said at least one requested instance.