HSSFName doesn't surface option flag so its not possible to tell what type of 
name record the HSSFName object represents

This important because a name record is used to hold so many different type of 
name and it is helpful to be able to use it to classify names when reading a 
workbook.  For example a name record with an option flag of 0x0E is a custom 
function name.  Calling the getSheetName() method for a record of this type 
generates an exception because there there is no external sheet associated 
with this type.

Bill Seddon