Validating and exploring characteristics of UML model elements

Creating OCL resources
You create an Object Constraint Language (OCL) resource to store OCL statements. You can then parse your OCL statements to ensure that they are syntactically valid or evaluate your OCL statements to query the characteristics of your metamodel.

Writing OCL statements
You can write an Object Constraint Language (OCL) statement to query the characteristics of UML model elements.

Parsing OCL statements
You can parse a single Object Constraint Language (OCL) statement to ensure that it is syntactically valid. If the OCL resource contains multiple OCL statements, the Console view reports that the OCL statements are syntactically incorrect. However, you can avoid this result if you parse one OCL statement at a time.

Evaluating OCL statements
You can evaluate a single Object Constraint Language (OCL) statement to query the characteristics of your metamodel. For example, you can evaluate an OCL statement that returns a simple type, such as a Boolean value, or you can evaluate an OCL statement that returns a list of metamodel objects. If the OCL resource contains multiple OCL statements, the Console view reports that the OCL statements are syntactically incorrect. However, if the OCL resource contains multiple OCL statements, you can evaluate a single selected OCL statement.