fmt:formatNumber <formatNumber> invalid type attribute: "percentage" percent
The JSTL Tag Library documentation seems to indicate that to format a number as a percentage you'd use:
<fmt:formatNumber type="percentage" value="0.5"/>
This gives the error message
<formatNumber>, invalid type attribute: "percentage"
Although the documentation for type says "Specifies whether the value is to be formatted as number, currency, or percentage" these aren't the possible values - it's "percent" for percentage:
<fmt:formatNumber type="percent" value="0.5"/>
If you know a good reference for JSTL I'd like to know ...
The Appendix A from JSTL in Action is not bad - it documents possible values for formatNumber type at least.