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Category Archives: OCL
OCL by example
This article was moved to MDriven Wiki – OCL by example Three videos to de-mystify OCL. A simple model and some expressions working on it for different purposes. The videos make use of the new OCL editor that has been … Continue reading
How to rename a class in your model – using the model debugger
This article was moved to MDriven Wiki – How to rename a class in your model – using the model debugger It’s important to keep your model in sync with the reality it reflects! But in a large model, some … Continue reading
Posted in Actions, EcoActionLanguage, MDrivenDesigner, Modlr, OCL, UML, ViewModel
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New OCL Editor
The OCL editor has been given an overhaul. Changes described with images: Even the ViewModelEditor has been given an ExpressionAnalyze button that checks the sum of all expressions used in a viewmodel: Remember that it is easy … Continue reading
PSExpression , or how to do things in the DB from MDriven
This article was moved to MDriven Wiki – PSExpression , or how to do things in the DB from MDriven One usual backend for MDriven systems is the relational database. We use OCL (object constraints language) and databases use SQL. … Continue reading
Posted in OCL, Tuples, ViewModel
Tagged IsPSExpression, max, min in the database, PSExpression, PSExpression_Refresh, SqlPassthrough, sum
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Derivation is not available in the database
This article was moved to MDriven Wiki – Derivation is not available in the database Derivation is a very good way to remove the need for repeating definitions. Suppose you have this model: An apartment has Occupants that may have … Continue reading
Posted in CO-Unique, Declarative, OCL
1 Comment
New operation added in ocl, ClassFromString
This article was moved to MDriven Wiki – ClassFromString When going meta it is sometimes interesting to treat your system types as strings – and then be able to treat those strings as types again. If you have a type … Continue reading
Constraints
This article was moved to MDriven Wiki – Constraints There are other ways to introduce business rules in the model than using state machines and guards. You can also use constraints. The model already has a lot of implicit constraints … Continue reading
Posted in MDrivenDesigner, OCL, UML, UMLSchool
1 Comment
UML – State machines
This article was moved to MDriven Wiki – Short introduction to UML– class diagram If the classes of your model define the statics we are now left with dealing with the dynamics of the domain. With the dynamics I mean … Continue reading
Posted in MDrivenServer, OCL, UML, UMLSchool
1 Comment
Microsoft office and OpenDocument as a Report generator
This article was moved to MDriven Wiki – Microsoft office and OpenDocument as a Report generator As we think that it would be great if we could generate word and excel documents straight from model driven data – we made … Continue reading
Posted in OCL, Reports, ViewModel
6 Comments