Section Header
    + name := AI_FILE;
    - comment := "Adobe Illustrator File";
Section Inherit
    + parent_std_file:Expanded STD_FILE;
Section Public
    + width:INTEGER;
    + height:INTEGER;
    - fill_bitmap b:BITMAP scale s:REAL_16_16 <-
    - is_type n:ABSTRACT_STRING :BOOLEAN <-
        Return true if the file name has '.ai' or '.AI' suffix