You can create an extended composition in a profile.
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Right-click a metaclass, stereotype, or criterion and select .
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Enter a name in the Name box. This name will be used as the name of the related tab in the object property sheet.
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[optional] Enter a comment.
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Select or enter a stereotype to further refine the instances of the target metaclass that may appear in the collection. Click the Create tool to the right of this field to create a new stereotype.
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Click Apply or OK to save your changes and return to your model.
You can view the tab associated with the composition by opening the property sheet of a metaclass instance. The tab contains Add and Insert Row, and Add Objects and Create an Object tools, which allow you to populate the composition.