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
Java Persistence with Hibernate
Java Persistence with Hibernate
Model management 2.0: manipulating richer mappings
Proceedings of the 2007 ACM SIGMOD international conference on Management of data
Compiling mappings to bridge applications and databases
Proceedings of the 2007 ACM SIGMOD international conference on Management of data
Anatomy of the ADO.NET entity framework
Proceedings of the 2007 ACM SIGMOD international conference on Management of data
On keys, foreign keys and nullable attributes in relational mapping systems
Proceedings of the 12th International Conference on Extending Database Technology: Advances in Database Technology
Efficient implementation of recursive queries in major object relational mapping systems
FGIT'11 Proceedings of the Third international conference on Future Generation Information Technology
Partial aggregation using hibernate
FGIT'11 Proceedings of the Third international conference on Future Generation Information Technology
Representing uniqueness constraints in object-relational mapping
TOOLS'12 Proceedings of the 50th international conference on Objects, Models, Components, Patterns
The Impedance Mismatch in Light of the Unified State Model
Fundamenta Informaticae - Concurrency Specification and Programming CS&P
Universal Query Language for Unified State Model
Fundamenta Informaticae - Dedicated to the Memory of Professor Manfred Kudlek
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Object/Relational Mapping (ORM) provides a methodology and mechanism for object-oriented systems to hold their long-term data safely in a database, with transactional control over it, yet have it expressed when needed in program objects. Instead of bundles of special code for this, ORM encourages models and use of constraints for the application, which then runs in a context set up by the ORM. Today's web applications are particularly well-suited to this approach, as they are necessarily multithreaded and thus are prone to race conditions unless the interaction with the database is very carefully implemented. The ORM approach was first realized in Hibernate, an open source project for Java systems started in 2002, and this year is joined by Microsoft's Entity Data Model for .NET systems. Both are described here.