An invisible attribute on a title block of the drawing, named "WD_TB," is encoded with the mapping information. This method eliminates the need for an external mapping text file. The format is <attribute name>=<LINEx>;<attribute name>=<LINEx>. Here is an example of what the WD_TB attribute value would be:
PROJ_TITLE=LINE1;DRAW_TITLE1=LINE2;DRAW_TITLE2=DWGDESC;PROJ_NUM=LINE4
Use the Title Block Setup utility to assign this information to the WD_TB attribute. The Title Block Setup utility works directly on the WD_TB attribute definition and cannot be used on a drawing with the title block inserted as a block. Open the base title block DWG file before running the Title Block Setup.