What does SX mean as a "condition code" ?I know what the XT...

What does SX mean as a "condition code" ?
I know what the XT means just not sure about SX
Thanks

Today: 16-Sep-2005 Time(AEST) Price Volume Value Condition Codes
17:26:34 1.7300 198,500 343,405.00 SX
16:26:50 1.7300 1,722 2,979.06 SX
16:11:51 1.7300 60,527 104,711.71
16:11:51 1.7300 20,000 34,600.00
16:11:51 1.7300 2,500 4,325.00
16:11:51 1.7300 20,000 34,600.00
16:11:51 1.7300 10,000 17,300.00
16:11:51 1.7300 17,588 30,427.24
16:11:51 1.7300 1,498 2,591.54
16:11:51 1.7300 5,896 10,200.08
16:11:51 1.7300 5,000 8,650.00 XT
16:11:51 1.7300 10,819 18,716.87
16:11:51 1.7300 1,000 1,730.00 XT
16:11:51 1.7300 1,802 3,117.46
16:11:51 1.7300 1,379 2,385.67
16:11:51 1.7300 128 221.44
16:11:51 1.7300 773 1,337.29
16:11:51 1.7300 1,176 2,034.48
16:11:51 1.7300 1,301 2,250.73
16:11:51 1.7300 1,033 1,787.09
16:11:51 1.7300 689 1,191.97 XT
16:11:51 1.7300 1,867 3,229.91
16:11:51 1.7300 900 1,557.00