PowerDesigner provides default model checks to verify the validity of data sources.
| 
                             Check  | 
                        
                             Description and Correction  | 
                    
|---|---|
| 
                             Data source name and code uniqueness  | 
                        
                             Data source names and codes must be unique in the model. Manual correction: Modify the duplicate name/code Automatic correction: Appends a number to the duplicate name/code  | 
                    
| 
                             Existence of physical data model  | 
                        
                             A data source must contain at least one physical data model in its definition. Manual correction: Add a physical data model from the Models tab of the property sheet of the data source. Automatic correction: Deletes data source without physical data model.  | 
                    
| 
                             Data source containing models differing DBMS types  | 
                        
                             The models in a data source should share the same DBMS since they represent a single database. Manual correction: Delete models with different DBMS or modify the DBMS of models in the data source. Automatic correction: None  | 
                    
| 
                             Unsupported source models  | 
                        
                             Each lifecycle policy can only manage one external database, so any data sources defined (and the models they reference) must all point to the same database. Manual correction: Remove any data sources pointing to other databases. Automatic correction: None  |