6. The system of claim 1 , wherein the decision entity comprises multiple decision problems of various types described by feature-value pairs that correspond to features of decision formal definitions, and further comprises relations to rules configured to make one or more decisions for solving the decision problem, programmable instructions configured to gather and format data factors necessary to make the one or more decisions, programmable instructions adapted to match data factors against rule conditions, programmable instructions configured to select a rule whose conditions are satisfied, and programmable instructions configured to execute actions associated with the selected rule.
6. The system of claim 1 , wherein the decision entity comprises multiple decision problems of various types described by feature-value pairs that correspond to features of decision formal definitions, and further comprises relations to rules configured to make one or more decisions for solving the decision problem, programmable instructions configured to gather and format data factors necessary to make the one or more decisions, programmable instructions adapted to match data factors against rule conditions, programmable instructions configured to select a rule whose conditions are satisfied, and programmable instructions configured to execute actions associated with the selected rule. 7. The system of claim 6 , wherein the programmable instructions are implemented as an SQL script, SQL stored procedures, and SQL functions.