B777-200 CREW WAS GIVEN A 'SWAP' RTE CHANGE ON TAXI OUT AT DEN. ROUTING NOMENCLATURE WAS CONFUSING AND RESULTED IN THE CREW BEGINNING TO FLY THE WRONG RTE.

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TAXIING OUT TO RWY 25; GND CTL CLRS 'SWAP RTE.1' OUR PAPERS INCLUDE CODED DEP ROUTES. WE PICK THE FIRST IN THE LIST; IT IS LABELED '1' ON DEP CTL. WE ARE CLRED DIRECT TO FIX; IT'S NOT IN OUR RTE OF FLT. WE QUESTION DEP CTL. HE HAS US GOING OVER HANKI. WE SHOW OUR DEP RTE GOING OVER HCT. HE RECLRS TO FLY PRESENT HEADING; AND SUBSEQUENTLY WE ARE CLRED PRESENT POS J94 ONL DBQ JVL. REVIEWING THE CODED DEP ROUTES; THEY ARE ALL LABELED '1.' TO DIFFERENTIATE BTWN CODED ROUTES IN DEN; IT APPEARS THE TERMINOLOGY WOULD BE 'CLRED SWAP' OR 'CODED DEP RTE E1;' OR 'N1;' ETC. HOWEVER; CODED DEP ROUTES RECEIVED THE NEXT DAY FOR OUR ORD FLT WERE ARRANGED IN ORDER; TOP TO BOTTOM; 1 THROUGH 8; AND A NINTH RTE LABELED '0.' EACH RTE HAD A LETTER FOLLOWING THE RTE NUMBER. THIS DISCREPANCY IN ARRANGING AND LABELING THESE ROUTES OPENS UP THE OPPORTUNITY FOR MISUNDERSTANDING. THIS TYPE OF REROUTE IS USUALLY GIVEN WHILE TAXIING. A HIGH WORKLOAD TIME AS IT IS; THEY ARE NOT THAT COMMON. WE NEED TO MAKE THE IDENTIFIERS STANDARD AND SIMPLE.