replace a string content through relations

Hi everyone,

I need your help to replace a string content with the help of relations.

Ex.     If the file name is "Bracket_Housing" then i need the description to be "Bracket Housing".

          I use description=rel_model_name() in relation but the output in descriotion with "_" symbol is odd.

          My component description is always the file name but without the "_".

          I want to eleminate the "_" in the description.