clarification on character format in scripts

Hi

i have a standard from name j_1a_F007_cd_mem. in this form in the main window there is a statement like this <bd>j_1ai02_barcode in the third line. but in this form this <bd> character format has not declared any one. im surprising how this is working with out declaring. can any one please clarify this one how this is working. whether this character format is calling from some where.

Thanks in advance.

Rahul.