Model generation uses existing connections and creates new connections for existing assignment relationships. However, no new relationships will be generated, and only additional graphical views of the database content you selected will be created. There are differences between model generation based on models on the one hand and based on objects on the other.
Model generation based on models
If there are already one or more connections in your database between two object definitions that are represented as object occurrences in the new model, these connections will be created between the object occurrences.
If an assignment relationship exists between two object definitions that are being used, a new connection will be created between the two object occurrences in the new model. The connection is of the same type as the assignment relationship.
If you want connections to be created during model generation only for the relationships (connections and assignments) that occur in one of the source models, enable the Use only relationships from the source models check box. If the check box is disabled, in addition to the relationships from the source models, all relationships that exist between the selected object definitions in the database will also be used.
Warning
Only the relationship types that are allowed by the method for the new model are used for model generation. The default values set in the method will be used to display the connections. If no connection type is activated in the user's current method filter, no connection will be created.
Model generation based on objects
If there are already one or more connections in your database between two object definitions that are represented as object occurrences in the new model, these connections will be created between the object occurrences.
If an assignment relationship exists between two object definitions that are being used, a new connection will be created between the two object occurrences in the new model. The connection is of the same type as the assignment relationship.
Warning
Only the relationship types that are allowed by the method for the new model are used for model generation. The default values set in the method will be used to display the connections. If no connection type is activated in the user's current method filter, no connection will be created.