When tags are addressed through a data server, the format of the tag string depends on the server. If the format is [Device]Item, the parameter file could use a placeholder to replace either of these parts, as in:
#1=Device1
#2=Carrots_Weight
If the data server syntax was Device.Folder.Tag, the parameter file could use placeholders to replace any or all of these parts at run time. The parameter file might contain:
#1=Device1
#2=Canning
#3=Peas_Weight
#4=Carrots_Weight
A tag address could replace Device with #1, Folder with #2 and Tag with #3 or #4.