Nova,
when you are talking about tags, I guess you are familiar with DSC versions prior to 8.x.
Since LV DSC 8.x the handling of the DSC module has changed completely.
To get an idea how it works now open the NI manuals folder and search for "DSC_Getting_Started.pdf"
(Start - Programs - NI - LabVIEW 8.x - Manuals
Thanks,
ThSa