break;
case ValueTag.XS_HEX_BINARY_TAG:
aCastToOp = new CastToHexBinaryOperation();
break;
case ValueTag.XS_G_DAY_TAG:
aCastToOp = new CastToGDayOperation();
break;
case ValueTag.XS_G_MONTH_DAY_TAG:
aCastToOp = new CastToGMonthDayOperation();
break;
case ValueTag.XS_G_MONTH_TAG: