E120 PIC QUESTIONS DFW GND CTLR TAXI CLRNC.

Narrative

ON THE GND AT DFW; WE WERE GIVEN TAXI INSTRUCTIONS OF 'L ON TXWY B; L ON TXWY K; STANDARD TAXI TO RWY 17R; EXCEPT EJ.' JUST AFTER STARTING THE TAXI; I HAD THE FO CLARIFY THE INSTRUCTIONS...WHAT DID 'EXCEPT EJ' MEAN. THE CTLR CLARIFIED WITH US THAT THE 'EXCEPT EJ' MEANT TO HOLD SHORT OF RWY 12L AT 'EJ' INSTEAD OF HOLDING SHORT AT TXWY Z. THERE WERE 3 OTHER COMMUTER FLTS AHEAD OF US THAT HAD RECEIVED THE SAME INSTRUCTIONS AND ALL 3 ACFT TOOK DIFFERENT TAXI ROUTES TO THE RWY. WITH THE RECENT INCREASE IN RWY INCURSIONS; AN INCIDENT LIKE THIS DEMONSTRATED HOW UNCLR INSTRUCTIONS CAN LEAD TO PLTS BEING LOST OR TAKING THE WRONG RTE AT A BUSY ARPT. THE 'NON STANDARD' ROUTING WAS DUE TO ILS CRITICAL AREAS ON RWY 17C AND THE NEED TO AVOID THESE AREAS. I WOULD SUGGEST THAT IN THE FUTURE; 'STANDARD TAXI' INSTRUCTIONS NOT BE USED IF THERE IS ANY MODIFICATION ON THE RTE. I WAS DISAPPOINTED THAT NONE OF THE OTHER 3 ACFT STOPPED TO CLARIFY THE INSTRUCTIONS. HAD THE WX BEEN POORER; THERE WOULD BE 3 ACFT LOST AT DFW AT ONCE -- FROM AN EASILY RECTIFIED PROB.