ACM Transactions on Database Systems (TODS), Volume 16

Volume 16, Number 1, March 1991

• Serge Abiteboul, Stéphane Grumbach:
  A Rule-Based Language with Functions and Sets. 1-30
  
• Alberto O. Mendelzon, Peter T. Wood:
  Functional Dependencies in Horn Clause Queries. 31-55
  
• Carlo Meghini, Costantino Thanos:
  The Complexity of Operations on a Fragmented Relation. 56-87
  
• Fausto Rabitti, Elisa Bertino, Won Kim, Darrell Woelk:
  A Model of Authorization for Next-Generation Database Systems. 88-131
  
• Gerhard Weikum:
  Principles and Realization Strategies of Multilevel Transaction Management. 132-180
  
• Ouri Wolfson, Amir Milo:
  The Multicast Policy and Its Relationship to Replicated Data Placement. 181-205
  

Volume 16, Number 2, June 1991

• Marco A. Casanova, Antonio L. Furtado, Luiz Tucherman:
  A Software Tool for Modular Database Design. 209-234
  
• Allen Van Gelder, Rodney W. Topor:
  Safety and Translation of Relational Calculus Queries. 235-278
  
• Dennis Shasha, Jason Tsong-Li Wang:
  Optimizing Equijoin Queries In Distributed Databases Where Relations Are Hash Partitioned. 279-308
  
• Francesca Cesarini, Giovanni Soda:
  A Dynamic Hash Method with Signature. 309-337
  
• Richard P. King, Nagui Halim, Hector Garcia-Molina, Christos A. Polyzois:
  Management of a Remote Backup Copy for Disaster Recovery. 338-368
  

Volume 16, Number 3, September 1991

• Martin Gogolla, Uwe Hohenstein:
  Towards a Semantic View of an Extended Entity-Relationship Model. 369-416
  
• Edward Sciore:
  Using Annotations to Support Multiple Kinds of Versioning in an Object-Oriented Database System. 417-438
  
• Dino Karabeg, Victor Vianu:
  Simplification Rules and Complete Axiomatization for Relational Update Transactions. 439-475
  
• Philip S. Yu, Avraham Leff, Yann-Hang Lee:
  On Robust Transaction Routing and Load Sharing. 476-512
  
• Mauro Negri, Giuseppe Pelagatti, Licia Sbattella:
  Formal Semantics of SQL Queries. 513-534
  
• Nick Roussopoulos:
  An Incremental Access Method for ViewCache: Concept, Algorithms, and Cost Analysis. 535-563
  
• Ravi Mukkamala, Sushil Jajodia:
  A Note on Estimating the Cardinality of the Projection of a Database Relation. 564-566
  

Volume 16, Number 4, December 1991

• Héctor J. Hernández, Edward P. F. Chan:
  Constant-Time-Maintainable BCNF Database Schemes. 571-599
  
• Wen-Chi Hou, Gultekin Özsoyoglu:
  Statistical Estimators for Aggregate Relational Algebra Queries. 600-654
  
• Mauro Negri, Giuseppe Pelagatti:
  Distributive Join: A New Algorithm for Joining Relations. 655-669
  
• Guido Moerkotte, Peter C. Lockemann:
  Reactive Consistency Control In Deductive Databases. 670-702
  
• Michael J. Carey, Miron Livny:
  Conflict Detection Tradeoffs for Replicated Data. 703-746