what is the syntax for writing impex for collection

i have a collection trpe data. i am representing the syntax along with the data. Please correct. Here i can have at most 6 capacity_id i can take at a time. So please confirm representation is correct or not

UPDATE Category;code[unique=true];capacity(start, xCoord, yCoord);$catalogVersion ;/CATALOG/GROUP/TOC_ID ; Capacity_ID,STARTX,STARTY : Capacity_ID,ENDX1, ENDY1 : ...... : Capacity_ID, ENDX6, ENDY6 ; ;