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
NIAM Information Analysis Method: Theory and Practice
NIAM Information Analysis Method: Theory and Practice
ConQuer: A Conceptual Query Language
ER '96 Proceedings of the 15th International Conference on Conceptual Modeling
Conceptual Queries Using ConQuer-II
ER '97 Proceedings of the 16th International Conference on Conceptual Modeling
The Object Constraint Language: Getting Your Models Ready for MDA
The Object Constraint Language: Getting Your Models Ready for MDA
Model Driven Development with NORMA
HICSS '07 Proceedings of the 40th Annual Hawaii International Conference on System Sciences
Information Modeling and Relational Databases
Information Modeling and Relational Databases
Formal Semantics of Dynamic Rules in ORM
OTM '08 Proceedings of the OTM Confederated International Workshops and Posters on On the Move to Meaningful Internet Systems: 2008 Workshops: ADI, AWeSoMe, COMBEK, EI2N, IWSSA, MONET, OnToContent + QSI, ORM, PerSys, RDDS, SEMELS, and SWWS
OTM'05 Proceedings of the 2005 OTM Confederated international conference on On the Move to Meaningful Internet Systems
Fact calculus: using ORM and lisa-d to reason about domains
OTM'05 Proceedings of the 2005 OTM Confederated international conference on On the Move to Meaningful Internet Systems
Giving meaning to enterprise architectures: architecture principles with ORM and ORC
OTM'06 Proceedings of the 2006 international conference on On the Move to Meaningful Internet Systems: AWeSOMe, CAMS, COMINF, IS, KSinBIT, MIOS-CIAO, MONET - Volume Part II
Automated verbalization for ORM 2
OTM'06 Proceedings of the 2006 international conference on On the Move to Meaningful Internet Systems: AWeSOMe, CAMS, COMINF, IS, KSinBIT, MIOS-CIAO, MONET - Volume Part II
OTM'06 Proceedings of the 2006 international conference on On the Move to Meaningful Internet Systems: AWeSOMe, CAMS, COMINF, IS, KSinBIT, MIOS-CIAO, MONET - Volume Part II
Mapping ORM to datalog: an overview
OTM'10 Proceedings of the 2010 international conference on On the move to meaningful internet systems
Subtyping and derivation rules in fact-based modeling
OTM'10 Proceedings of the 2010 international conference on On the move to meaningful internet systems
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A conceptual schema of an information system specifies the fact structures of interest as well as related business rules that are either constraints or derivation rules. Constraints restrict the possible or permitted states or state transitions, while derivation rules enable some facts to be derived from others. Graphical languages are commonly used to specify conceptual schemas, but often need to be supplemented by more expressive textual languages to capture additional business rules, as well as conceptual queries that enable conceptual models to be queried directly. This paper describes research to provide a role calculus to underpin textual languages for Object-Role Modeling (ORM), to enable business rules and queries to be formulated in a language intelligible to business users. The role-based nature of this calculus, which exploits the attribute-free nature of ORM, appears to offer significant advantages over other proposed approaches, especially in the area of semantic stability.