# VTScada-HistoricalTools Key Point: In the tags list file, the Source Name field is the unique identifier for the tag name to query. In VTScada this can be something like ```temp\old_value1```. In ClearSCADA, it will be the unique point ID, ex. ```005152```. The leading zeroes can be left out as the script will pad them in front of the integere to determine the correct path.