Incomplete Information in Relational Databases
Journal of the ACM (JACM)
Design by exmple: An application of Armstrong relations
Journal of Computer and System Sciences
Functional dependencies and constraints on Null values in database relations
Information and Control
Principles of database and knowledge-base systems, Vol. I
Principles of database and knowledge-base systems, Vol. I
On the satisfiability of dependency constraints in entity-relationship schemata
Information Systems
The design of relational databases
The design of relational databases
Cardinality constraints in semantic data models
Data & Knowledge Engineering
Algorithms for inferring functional dependencies from relations
Data & Knowledge Engineering
Complexity tailored design: a new design methodology for databases with incomplete information
Journal of Computer and System Sciences - Special issue on selected papers presented at the 24th annual ACM symposium on the theory of computing (STOC '92)
Identifying the Minimal Transversals of a Hypergraph and Related Problems
SIAM Journal on Computing
Semantic representations and query languages for or-sets
Journal of Computer and System Sciences
Null inclusion dependencies in relational databases
Information and Computation
Axiomatisation of functional dependencies in incomplete relations
Theoretical Computer Science
Computational problems related to the design of normal form relational schemas
ACM Transactions on Database Systems (TODS)
Extending the database relational model to capture more meaning
ACM Transactions on Database Systems (TODS)
Multivalued dependencies and a new normal form for relational databases
ACM Transactions on Database Systems (TODS)
On the Equivalence of Database Models
Journal of the ACM (JACM)
Horn clauses and database dependencies
Journal of the ACM (JACM)
On the Structure of Armstrong Relations for Functional Dependencies
Journal of the ACM (JACM)
A relational model of data for large shared data banks
Communications of the ACM
A complete axiomatization for functional and multivalued dependencies in database relations
SIGMOD '77 Proceedings of the 1977 ACM SIGMOD international conference on Management of data
Information Engineering: Introduction
Information Engineering: Introduction
Software Engineering Economics
Software Engineering Economics
Foundations of Databases: The Logical Level
Foundations of Databases: The Logical Level
A Guided Tour of Relational Databases and Beyond
A Guided Tour of Relational Databases and Beyond
Entity-Relationship Modeling: Foundations of Database Technology
Entity-Relationship Modeling: Foundations of Database Technology
On the implication problem for cardinality constraints and functional dependencies
Annals of Mathematics and Artificial Intelligence
Using Constraints for Efficient Query Processing in Nondeterministic Databases
IEEE Transactions on Knowledge and Data Engineering
Fundamentals of Cardinality Constraints
ER '92 Proceedings of the 11th International Conference on the Entity-Relationship Approach: Entity-Relationship Approach
SEQUEL: A structured English query language
SIGFIDET '74 Proceedings of the 1974 ACM SIGFIDET (now SIGMOD) workshop on Data description, access and control
Reasoning about participation constraints and Chen's constraints
ADC '03 Proceedings of the 14th Australasian database conference - Volume 17
Journal of Computer and System Sciences - Special issue on PODS 2000
A normal form for XML documents
ACM Transactions on Database Systems (TODS)
Strong functional dependencies and their application to normal forms in XML
ACM Transactions on Database Systems (TODS)
An information-theoretic approach to normal forms for relational and XML data
Journal of the ACM (JACM)
Theory of Relational Databases
Theory of Relational Databases
GORDIAN: efficient and scalable discovery of composite keys
VLDB '06 Proceedings of the 32nd international conference on Very large data bases
Semantic sampling of existing databases through informative Armstrong databases
Information Systems
EDBT '08 Proceedings of the 11th international conference on Extending database technology: Advances in database technology
Unary and n-ary inclusion dependency discovery in relational databases
Journal of Intelligent Information Systems
Two-variable logic on data trees and XML reasoning
Journal of the ACM (JACM)
Efficient reasoning about a robust XML key fragment
ACM Transactions on Database Systems (TODS)
The VLDB Journal — The International Journal on Very Large Data Bases
Communications of the ACM
Numerical constraints on XML data
Information and Computation
Characterizing schema mappings via data examples
Proceedings of the twenty-ninth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
When data dependencies over SQL tables meet the logics of paradox and S-3
Proceedings of the twenty-ninth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Fundamentals of Database Systems
Fundamentals of Database Systems
On multi-column foreign key discovery
Proceedings of the VLDB Endowment
A co-relational model of data for large shared data banks
Communications of the ACM
Queue - Data
On Codd Families of Keys over Incomplete Relations
The Computer Journal
SDKB'10 Proceedings of the 4th international conference on Semantics in data and knowledge bases
Codd table representations under weak possible world semantics
DEXA'11 Proceedings of the 22nd international conference on Database and expert systems applications - Volume Part I
A precious class of cardinality constraints for flexible XML data processing
ER'11 Proceedings of the 30th international conference on Conceptual modeling
Design by example for SQL table definitions with functional dependencies
The VLDB Journal — The International Journal on Very Large Data Bases
Some contributions to the minimum representation problem of key systems
FoIKS'06 Proceedings of the 4th international conference on Foundations of Information and Knowledge Systems
Letting keys and functional dependencies out of the bag
APCCM '13 Proceedings of the Ninth Asia-Pacific Conference on Conceptual Modelling - Volume 143
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Conceptual models are relational database schemata that result from conceptual data modeling. Conceptual models usually capture the semantics of the underlying application domain inadequately. Therefore, the structure of the conceptual model is often inadequate, too. Academic and commercial database design tools often advocate the use of good test data to validate the adequacy of the conceptual models they produce. In this article we provide evidence that Armstrong databases constitute perfect test data. In particular, Armstrong databases capture perfectly the perceptions of the design team about the semantics of the application domain. Therefore, Armstrong databases serve as an excellent medium to validate and consolidate the understanding of an application domain's semantics, and to communicate this understanding between different stakeholders of the target database. An overview is given about recent advancements on the structural and computational properties of Armstrong databases. These advancements suggest that Armstrong databases provide the foundations necessary to establish an agile database design methodology. Such a methodology complements existing approaches to database design, and is not meant to replace them.