Changes to metamodels as a result of iterative development might impact a mapping model. You might add or remove metamodels when the scope of a transformation increases, or if metamodel objects move to different metamodels. You might edit a metamodel URI if the metamodel location changes.
Check the Problems view for error and warning information about missing metamodels. The table on the Input Models and Output Models tabs also displays warnings if the specified metamodel paths are incorrect.
To manage the input and output metamodels in a mapping model: