Communications of the ACM
The ObjectStore database system
Communications of the ACM
The GemStone object database management system
Communications of the ACM
Understanding the new SQL: a complete guide
Understanding the new SQL: a complete guide
The object database standard: ODMG 2.0
The object database standard: ODMG 2.0
Object-oriented modeling and design for database applications
Object-oriented modeling and design for database applications
Foundation for object/relational databases: the third manifesto
Foundation for object/relational databases: the third manifesto
The object constraint language: precise modeling with UML
The object constraint language: precise modeling with UML
An introduction to database systems (7th ed.)
An introduction to database systems (7th ed.)
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 the Expressive Power of OCL
FM '99 Proceedings of the Wold Congress on Formal Methods in the Development of Computing Systems-Volume I - Volume I
Modular architecture for a toolset supporting OCL
UML'00 Proceedings of the 3rd international conference on The unified modeling language: advancing the standard
Using UML/OCL constraints for relational database design
UML'99 Proceedings of the 2nd international conference on The unified modeling language: beyond the standard
Enriching the class diagram concepts to capture natural language semantics for database access
Data & Knowledge Engineering
VMQL: A visual language for ad-hoc model querying
Journal of Visual Languages and Computing
On relationships between query models
ECMDA-FA'05 Proceedings of the First European conference on Model Driven Architecture: foundations and Applications
Model querying with graphical notation of QVT relations
ACM SIGSOFT Software Engineering Notes
Querying business process models with VMQL
Proceedings of the 5th ACM SIGCHI Annual International Workshop on Behaviour Modelling - Foundations and Applications
Textual and Content-Based Search in Repositories of Web Application Models
ACM Transactions on the Web (TWEB)
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UML is the de-facto standard language for Object-Oriented analysis and design of information systems. Persistent storage and extraction of data in such systems is supported by databases and query languages. UML sustains many aspects of software engineering; however, it does not provide explicit facility for writing queries. It is crucial for any such query language to have, at least, the expressive power of Relational Algebra, which serves as a benchmark for evaluating its expressiveness. The combination of UML and OCL can form queries with the required expressive power. However, certain extensions to OCL are essential if it is to be used effectively as a Query Language. The adoption of the ideas presented in this paper will enable query expressions to be written using OCL, that are elegant and ideally suited for use in conjunction with UML data models. This technique is illustrated by expressing the UML equivalent of an example Relational data model and associated query expressions.