Constraint diagrams: visualizing invariants in object-oriented models
Proceedings of the 12th ACM SIGPLAN conference on Object-oriented programming, systems, languages, and applications
Handbook of graph grammars and computing by graph transformation: volume I. foundations
Handbook of graph grammars and computing by graph transformation: volume I. foundations
N degrees of separation: multi-dimensional separation of concerns
Proceedings of the 21st international conference on Software engineering
The PROGRES approach: language and environment
Handbook of graph grammars and computing by graph transformation
The AGG approach: language and environment
Handbook of graph grammars and computing by graph transformation
Adaptive Object-Oriented Software: The Demeter Method with Propagation Patterns
Adaptive Object-Oriented Software: The Demeter Method with Propagation Patterns
Arranging language features for more robust pattern-based crosscuts
Proceedings of the 2nd international conference on Aspect-oriented software development
A Visualization of OCL Using Collaborations
«UML» '01 Proceedings of the 4th International Conference on The Unified Modeling Language, Modeling Languages, Concepts, and Tools
Aspect-oriented software development
Aspect-oriented software development
Query-by-example: a data base language
IBM Systems Journal
A compilation and optimization model for aspect-oriented programs
CC'03 Proceedings of the 12th international conference on Compiler construction
Expressing different conceptual models of join point selections in aspect-oriented design
Proceedings of the 5th international conference on Aspect-oriented software development
Proceedings of the 6th international conference on Aspect-oriented software development
Weaving models in conflict detection specifications
Proceedings of the 2007 ACM symposium on Applied computing
Proceedings of the 2008 AOSD workshop on Aspect-oriented modeling
Managing Model Conflicts in Distributed Development
MoDELS '08 Proceedings of the 11th international conference on Model Driven Engineering Languages and Systems
Constraints modeling for (profiled) UML models
ECMDA-FA'07 Proceedings of the 3rd European conference on Model driven architecture-foundations and applications
Extending OCL to ensure model transformations
ER'07 Proceedings of the 2007 conference on Advances in conceptual modeling: foundations and applications
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
Software performance antipatterns: modeling and analysis
SFM'12 Proceedings of the 12th international conference on Formal Methods for the Design of Computer, Communication, and Software Systems: formal methods for model-driven engineering
MOCQL: a declarative language for ad-hoc model querying
ECMFA'13 Proceedings of the 9th European conference on Modelling Foundations and Applications
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Specifying queries on models is a prerequisite to model transformations in the MDA because queries select the model elements that are the source of transformations. Current responses to OMG's MOF 2.0 QVT RFP mostly propose to use (and/or extend) OCL 2.0 as specification language for queries. In this paper, we demonstrate that using textual notations (like OCL) quickly leads to complex query statements even for simple queries. In order to overcome this handicap, we present a graphical notation based on the UML that facilitates comprehension of query statements as well as estimation of the (ultimately) selected model elements. We advocate that queries should be specified in terms of user model entities and user model properties (rather than meta model entities and meta model properties) for the sake of feasibility and comprehensibility to the user.