Rules Reference

Model Validation works by applying a set of validation rules to the selected object. These rules are arranged in groups.

Rule Groups

Group	Description	See also
Well-Formedness	The validator applies these rules to check whether or not an element, relationship, feature or diagram is well-formed; for example, whether the object is a valid UML item or whether a diagram contains valid elements within it.	Well-Formedness
Element Composition	The validator applies these rules to check whether or not a UML element contains valid children, whether it contains the right number of valid children, and whether or not the element is missing any required children.	Element: Composition
Property Validity	The validator applies these rules to check whether or not the element, relationship or feature has the correct UML properties defined, and whether the properties contain incorrect or conflicting values.	Property Validity
Custom Properties	The validator applies these rules to check an element, relationship or feature against any defined constraints in OCL.	OCL Conformance

Error Message Format

When you perform a validation, any violations of the rules are listed on the System Output window. Each violation has a violation ID of the format:

MVRxxnnnn

•	MVR stands for Model Validation Rule

•	xx is a hexadecimal number corresponding to the position of the validation rule in the Model Validation Configuration dialog, thus indicating which rule is applied and violated

•	nnnn is the number of the violation message

For example:

•	Messages with the ID MVR01nnnn indicate that the Element: Well-Formedness checkbox is selected and a violation of that rule has been detected

•	Messages with the ID MVR0Annnn indicate that the Feature: OCL Conformance checkbox (10th in order on the dialog, or Ath in hexadecimal) is selected and a violation of that rule has been detected

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