Composite regions in topological queries
Information Systems
Spatial data integrity constraints in object oriented geographic data modeling
Proceedings of the 7th ACM international symposium on Advances in geographic information systems
Spatio-temporal conceptual models: data structures + space + time
Proceedings of the 7th ACM international symposium on Advances in geographic information systems
Extending Ladkin's algebra on non-convex intervals towards an algebra on union-of regions
Proceedings of the 8th ACM international symposium on Advances in geographic information systems
Proceedings of the 8th ACM international symposium on Advances in geographic information systems
Requirements and research issues in geographic data modeling
Proceedings of the 9th ACM international symposium on Advances in geographic information systems
A Small Set of Formal Topological Relationships Suitable for End-User Interaction
SSD '93 Proceedings of the Third International Symposium on Advances in Spatial Databases
OCL as a Specification Language for Business Rules in Database Applications
«UML» '01 Proceedings of the 4th International Conference on The Unified Modeling Language, Modeling Languages, Concepts, and Tools
Modeling Topological Constraints in Spatial Part-Whole Relationships
ER '01 Proceedings of the 20th International Conference on Conceptual Modeling: Conceptual Modeling
Representing topological relationships among heterogeneous geometry-collection features
Journal of Computer Science and Technology
Using UML/OCL constraints for relational database design
UML'99 Proceedings of the 2nd international conference on The unified modeling language: beyond the standard
MSRIC: a model for spatial relations and integrity constraints in topographic databases
AIKED'06 Proceedings of the 5th WSEAS International Conference on Artificial Intelligence, Knowledge Engineering and Data Bases
ER '08 Proceedings of the 27th International Conference on Conceptual Modeling
From the conceptual design of spatial constraints to their implementation in real systems
Proceedings of the 17th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Formalization and reasoning about spatial semantic integrity constraints
Data & Knowledge Engineering
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Recent works underline that the integration of topological relationships into the Object Constraint Language (OCL) is an important field of investigation. The final goal is to provide an expressive language adapted to precisely model alphanumerical and topological constraints. In order to reach this goal, the present paper focuses on the integration of the 9 Intersection Method (9IM) into OCL. We show that this OCL+9IM language is especially suitable for the specification of topological constraints implying composite spatial objects. The expressive power of the language is also studied from a spatial point of view, and the SQL code generation from OCL+9IM expressions is considered. An important validation is related to the use of the language in the context of agricultural information systems.