The resolution:
function splitString():void{
var rtaString:String = myRTA.text;
var pattern:RegExp = /\b[A-Za-z0-9'-]+\b/gi;
var result:Array = new Array();
var temp:Array;
temp = pattern.exec(rtaString);
while (temp != null) {
result.push({position:temp.index, word:temp});
trace (temp.index, temp);
temp = pattern.exec(rtaString);
}
myDGrid.dataProvider = result;
}
