Modelling topological and metrical properties in physical processes
Proceedings of the first international conference on Principles of knowledge representation and reasoning
Designing object systems: object-oriented modelling with Syntropy
Designing object systems: object-oriented modelling with Syntropy
The object constraint language: precise modeling with UML
The object constraint language: precise modeling with UML
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
A Taxonomy of Spatial Data Integrity Constraints
Geoinformatica
Qualitative Spatio-Temporal Continuity
COSIT 2001 Proceedings of the International Conference on Spatial Information Theory: Foundations of Geographic Information Science
SSD '97 Proceedings of the 5th 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
The Object Constraint Language: Getting Your Models Ready for MDA
The Object Constraint Language: Getting Your Models Ready for MDA
Conceptual Modeling for Traditional and Spatio-Temporal Applications: The MADS Approach
Conceptual Modeling for Traditional and Spatio-Temporal Applications: The MADS Approach
Environmental Modelling & Software
Qualified topological relations between spatial objects with possible vague shape
International Journal of Geographical Information Science
Using UML/OCL constraints for relational database design
UML'99 Proceedings of the 2nd international conference on The unified modeling language: beyond the standard
On languages for the specification of integrity constraints in spatial conceptual models
ER'07 Proceedings of the 2007 conference on Advances in conceptual modeling: foundations and applications
ER'05 Proceedings of the 24th international conference on Conceptual Modeling
Entity-relationship and object-oriented formalisms for modeling spatial environmental data
Environmental Modelling & Software
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Integrity constraints can control topological relations of objects in spatial databases. These constraints can be modelled using formal languages such as the spatial extension of the Object Constraint Language (Spatial OCL). This language allows the expression of topological integrity constraints involving crisp spatial objects but it does not support constraints involving spatial objects with vague shapes (e.g. forest stand, pollution zone, valley or lake). In this paper, we propose an extension of Spatial OCL based on (1) a geometric model for objects with vague shapes, and (2) an adverbial approach for modelling topological constraints involving regions with broad boundaries. This new language provides an easiness in the formal modelling of these complex constraints. Our approach has been implemented in a code generator. A case study is also presented in the paper in the field of agriculture spreading activities. AOCL OVS takes account of the shape vagueness of spread parcel and improve spatial reasoning about them.