22. The database system of claim 21 , wherein said actor a attempting to access said resource r for a given operation is granted access if one of the two conditions is met, the first condition being if the capabilities for the  said operation of said actor a includes a key to said resource r, and wherein the second condition is that the policy P for the said operation of said resource r, said policy being evaluated on said actor a, returns True.
22. The database system of claim 21 , wherein said actor a attempting to access said resource r for a given operation is granted access if one of the two conditions is met, the first condition being if the capabilities for the  said operation of said actor a includes a key to said resource r, and wherein the second condition is that the policy P for the said operation of said resource r, said policy being evaluated on said actor a, returns True. 23. The database system of claim 22 , wherein memes are, by default, left readable and linkable but not writeable to everyone.