The relational model with relation-valued attributes
Information Systems
Non first normal form relations: An algebra allowing data restructuring
Journal of Computer and System Sciences
Relational queries computable in polynomial time
Information and Control
PODS '87 Proceedings of the sixth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Sets and negation in a logic data base language (LDL1)
PODS '87 Proceedings of the sixth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
IFO: a formal semantic database model
ACM Transactions on Database Systems (TODS)
On the complexity of queries in the logical data model
Lecture notes in computer science on ICDT '88
Object identity as a query language primitive
SIGMOD '89 Proceedings of the 1989 ACM SIGMOD international conference on Management of data
Untyped sets, invention, and computable queries
PODS '89 Proceedings of the eighth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Fixpoint extensions of first-order logic and datalog-like languages
Proceedings of the Fourth Annual Symposium on Logic in computer science
VERSO: a database machine based on nested relations
Nested relations and complex objects in databases
A rule-based language with functions and sets
ACM Transactions on Database Systems (TODS)
ICDT '90 Proceedings of the third international conference on database theory on Database theory
Non-deterministic languages to express deterministic transformations
PODS '90 Proceedings of the ninth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
On the expressive power of logic programming languages with sets
Proceedings of the seventh ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Possibilities and limitations of using flat operators in nested algebra expressions
Proceedings of the seventh ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
On the expressive power of database queries with intermediate types
Proceedings of the seventh ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Journal of the ACM (JACM)
A new approach to database logic
PODS '84 Proceedings of the 3rd ACM SIGACT-SIGMOD symposium on Principles of database systems
The complexity of relational query languages (Extended Abstract)
STOC '82 Proceedings of the fourteenth annual ACM symposium on Theory of computing
Extended Algebra and Calculus for ~1NF Relational Databases
Extended Algebra and Calculus for ~1NF Relational Databases
Functional and predictive programming in OODB's
PODS '92 Proceedings of the eleventh ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Towards tractable algebras for bags
PODS '93 Proceedings of the twelfth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
On the power of algebras with recursion
SIGMOD '93 Proceedings of the 1993 ACM SIGMOD international conference on Management of data
Projection-propagation in complex-object query languages
CIKM '93 Proceedings of the second international conference on Information and knowledge management
Tutorial: languages for collection types
PODS '94 Proceedings of the thirteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
PODS '94 Proceedings of the thirteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Dense-order constraint databases (extended abstract)
PODS '95 Proceedings of the fourteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
The power of languages for the manipulation of complex values
The VLDB Journal — The International Journal on Very Large Data Bases
On the Expressive Power of Simply Typed and Let-Polymorphic Lambda Calculi
LICS '96 Proceedings of the 11th Annual IEEE Symposium on Logic in Computer Science
On the complexity of nonrecursive XQuery and functional query languages on complex values
Proceedings of the twenty-fourth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
A unified framework for heterogeneous patterns
Information Systems
Foundations of rule-based query answering
RW'07 Proceedings of the Third international summer school conference on Reasoning Web
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