[Qgis-user] Use of "description column" in "value relation widget"

[Klaus Mithöfer]

Dear all,

I'd like to use the "description column" in "value relation widget". I 
thought I could create an expression fro the drop-down list like 
concat("field1","field2"). But it doesn't work. What ist the 
"description column" good for?

Kind regards
Klaus