A FLIGHT CREW TAXIING AT DEN IS TOLD TO TAXI TO RWY 17L VIA TAXIWAYS M; ED; AND CN THEN HOLD SHORT OF RWY 17R. CONFUSION RESULTS BECAUSE NO HOLD SHORT LINES EXIST ON ED FOR RWY 17R AND THE CREW ASSUMES CN ENDS AT L AND SO IS NOT ENTERED DURING THIS TAXI EVENT.

Narrative

WE ARE RPTING ON AMBIGUOUS TAXI INSTRUCTIONS GIVEN TO US ON TAXI OUT FROM DEN. THESE TAXI INSTRUCTIONS HAD US HOLDING SHORT ON A TXWY NOT INTERSECTING A LNDG RWY; BUT HOLDING FOR LNDG TFC. WE WERE GIVEN INSTRUCTIONS TO TAXI ON MIKE; ECHO-DELTA; HOLD SHORT ON CN FOR LNDG TFC ON RWY 17R. YOU PROBABLY NEED A CHART OUT TO SEE THIS. WE TURNED RIGHT ON CN AND WERE TOLD TO STOP FOR LNDG TFC; AN INSTRUCTION WITH WHICH WE COMPLIED. IN THE MEANTIME; AN AIR CARRIER ACFT CAME SCREAMING OUT FROM 7E; AND WE NEVER HEARD IT RECEIVE TAXI INSTRUCTIONS. IT DID NOT HOLD SHORT FOR THE LNDG TFC; AND CROSSED RELATIVELY CLOSE IN FRONT OF IT. WE MADE THE RIGHT TURN; WITH THE UNDERSTANDING THAT THE CN ENDED AT L; AND BEGAN TO LOOK FOR THE HOLD SHORT LINE; WHICH WE HAVE NOTICED BEFORE ON THE OTHER SIDE OF THE RWY. WE WERE TOLD TO STOP DURING THIS; AND WERE UNSURE OF THE INTENT OF THE INSTRUCTION; ESPECIALLY SINCE THE CTLR MAY HAVE SENT ANOTHER ACFT IN FRONT OF THE LNDG TFC. IT IS NOT CLEAR; THEN; WHETHER WE SHOULD HAVE HELD SHORT OF CN; OR FOR THAT MATTER; WHERE WE SHOULD HAVE HELD SHORT FOR LNDG TFC. THE ARPT PAGE DOES NOT DISTINGUISH WHERE CN ENDS AND ED BEGINS. THUS; WE WERE UNSURE WHETHER THERE WAS AN ISSUE WITH OUR TAXI. I DON'T SEE THIS AS A RWY INCURSION ISSUE; EXCEPT MAYBE FOR THE OTHER AIR CARRIER ACFT WHO WAS IN FRONT OF US; AND IT WAS DEFINITELY A GRAY AREA FOR THE ARPT PAGE; AS WELL AS THE CTLR INSTRUCTIONS.