Logical foundations of object-oriented and frame-based languages
Journal of the ACM (JACM)
The entity-relationship model—toward a unified view of data
ACM Transactions on Database Systems (TODS) - Special issue: papers from the international conference on very large data bases: September 22–24, 1975, Framingham, MA
On XML integrity constraints in the presence of DTDs
Journal of the ACM (JACM)
Reasoning About Equations and Functional Dependencies on Complex Objects
IEEE Transactions on Knowledge and Data Engineering
Retaining Semantics in Relational Databases by Mapping them to RDF
WI-IATW '06 Proceedings of the 2006 IEEE/WIC/ACM international conference on Web Intelligence and Intelligent Agent Technology
The Description Logic Handbook
The Description Logic Handbook
Bridging the gap between OWL and relational databases
Proceedings of the 16th international conference on World Wide Web
Semantic Integration of Heterogeneous Databases on the Web
ICCTA '07 Proceedings of the International Conference on Computing: Theory and Applications
EDBT '08 Proceedings of the 11th international conference on Extending database technology: Advances in database technology
Keys, nominals, and concrete domains
Journal of Artificial Intelligence Research
Handbook on Ontologies
Mapping Relational Databases to the Semantic Web with Original Meaning
KSEM '09 Proceedings of the 3rd International Conference on Knowledge Science, Engineering and Management
What about constraints in RDF?
Conceptual Modelling and Its Theoretical Foundations
Bringing relational databases into the Semantic Web: A survey
Semantic Web - On real-time and ubiquitous social semantics
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Today, most of the data on the web resides in relational databases. To make the data available for the semantic web mappings into RDF can be used. Such mappings should preserve the information about the structure of keys and foreign keys, because otherwise important semantic information is lost. In this paper, we discuss several possible ways to map relational databases into an RDF graph. We discuss the problem of how to represent the original key and foreign key constraints in the resulting RDF graph and demonstrate, that different kinds of mappings require different solutions. We finally propose to explicitly represent the structure of keys and foreign keys by means of the vocabulary of a new RDF namespace.