Archived models store all constraint names without making a difference between user defined and calculated constraints. These models are used with the modify database feature.
        
            You can archive a PDM with the .apm file extension, using the following methods:
            
         
        
            
                Select , select Archived PDM (bin) or Archived PDM (xml) in the Save As Type list, and click Save.
                 
                    
                        or
                    
                    Select , click the Options tab, select the Automatic Archive check box in the After Generation groupbox, and click OK.