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. 14. The method of claim 12 , wherein at least one of said plurality of contextual relations defines an inherence relation between one of said plurality of instance types to another of said plurality of instance types.