AbstractRule 0: The Foundation RuleRule 1: The Information RuleRule 2: The Guaranteed Access RuleRule 3: Systematic Treatment of Null ValuesRule 4: Dynamic Online Catalog Based on the Relational ModelRule 5: The Comprehensive Data Sublanguage RuleRule 6: The View Updating RuleRule 7: High-Level Insert, Update, DeleteRule 8: Physical Data IndependenceRule 9: Logical Data IndependenceRule 10: Integrity IndependenceRule 11: Distribution IndependenceRule 12: Nonsubversion Rule