ACR FLT CREW QUESTIONS COMMERCIAL CHART'S METHOD OF INDICATING MANDATORY VERSUS EXPECT ALT AND AIRSPD RESTRS.

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WE WERE PROCEEDING DIRECT TO KARLA ON THE BONHAM 5 ARR INTO DFW. OUR CLRNC WAS TO CROSS KARLA AT 11000 FT. OUR COMPANY IS USING COMMERCIAL CHARTS EXCLUSIVELY. NEXT TO THE KARLA INTXN IT STATES 'EXPECT 11000 FT; 250 KTS LNDG S JET.' THE CAPT AND I BOTH AGREED THAT THIS MEAN 'EXPECT 11000 FT AND EXPECT 250 KTS.' ATC CLRED US TO CROSS KARLA AT 11000 FT (THERE WAS NOT AN AIRSPD RESTR GIVEN). AS WE APCHED KARLA ATC ASKED US WHAT OUR SPD WAS. I REPLIED 260 KTS AND SLOWING. ATC WAS UPSET WITH OUR AIRSPD AND ISSUED US A BEST RATE OF DSCNT TO A LOWER ALT. WE ASKED IF OUR SPD WAS A PROB AND THE CTLR REPLIED 'YES IT WAS!' DURING OUR POSTFLT DEBRIEF; WE REVIEWED THE CHART AGAIN. IT STILL SEEMED TO US THAT THE CHART MEANT THAT BOTH THE ALT AND AIRSPD WERE 'EXPECTED' NOT 'REQUIRED.' THIS WAS THE FIRST LEG OF OUR TRIP; IT WAS AN AFTERNOON DEP; AND WE WERE WELL RESTED. THE CAUSE OF OUR PROB WAS A VERY UNCLR STATEMENT ON THE ARR CHART (EXPECT 11000 FT; 250 KTS LNDG S JET). WE BOTH BELIEVED THAT EVERY RESTR AFTER THE WORD 'EXPECT' WAS EXPECTED; NOT REQUIRED. WE WERE WRONG. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR HAS NOT HAD A GREAT DEAL OF EXPERIENCE WITH THIS CHART MARKER'S PRODUCT; HOWEVER; THE CAPT WAS FAIRLY EXPERIENCED AND STILL DID NOT COMPREHEND THE MEANING OF THESE NOTES. HE FEELS THAT SOME MINOR CHANGES COULD BE MADE TO MAKE THESE NOTES MORE INTUITIVE.