About Connected References for Data Shortcuts (Drefs)
Drefs extend the External References palette so that you can manage data shortcut references alongside external references (xrefs) in a single location. On the Dref tab, each reference is listed with its status, source drawing, and other details, so you can identify and resolve broken references without leaving the palette.
To Fix Broken Drefs
Repair broken data shortcut references from the External References palette.