This option enables you to compare the source and target data before you select it to be merged. You can select item types to be compared either in batch mode (group mode) or one by one. If you use group mode, the Merger Utility allows you to save the comparison list in a number of file formats (psr, dbf, xls, .xlsx and so forth). If you do not select group mode, the Merger Utility displays the comparison data in a special dialog for each item type that you select in the Compare Source-Target Data window.
After running the comparison list, you should examine the comparison results carefully and select the data transfer mode and transfer parameters. For example, you can determine whether you want to delete target data that does not exist in the source or whether you want to delete all the tags associated with a deleted loop, and so forth. You can also access specific comparison data, such as Specs, Process Data, Cross Wiring, Signals, and so forth, depending on the item type you selected to compare. Furthermore, you can customize the comparison list data display by filtering and/or sorting the data according to your needs.