Where is the {Ref DM Target} Tag in Editor Issue 4.0??

Im trying to link my Warnings to a specific section of a DM, (Procedural DM Issue 4.0) But I cant find the target field??

Does anyone know where the "Ref DM Target" attribute field is? Or basically how do you designate a "target" (link to a particular place or ID in a Data Module) in Arbortext Editor (Issue 4.0)??? In previous versions (3 and below) you could hit CTRL D/modify attributes and the Target attribute is available in that window.....But that is no longer the case. I can't find it in Issue 4.0?? I think they may have changed the tag name, (like everything else) but if so it is not obvious and Im not sure where it is...Can anyone help