Execute the function. The function must return
a valid object.
int context = getArg0AsNode(xctxt);
if(DTM.NULL == context)
return XString.EMPTYSTRING;
DTM dtm = xctxt.getDTM(context);
String s = (context != DTM.NULL) ? dtm.getLocalName(context) : "";
if(s.startsWith("#") || s.equals("xmlns"))
return XString.EMPTYSTRING;
return new XString(s);