[xslt] format-number() and NaN

["Stephan Otte" <Stephan Otte pcc de>]

Hi
As Michael Kay's XSLT Programmer's Reference says,
the conversion rules for the value argument of format-number() from string to
number
are the same as for the number() function.
format-number("", "###.###")  or format-number("xyz", "###.###") should
therefore give NaN as result,
which could be redirected with <xsl:decimal-format NaN="not available">.
But libxslt gives something like 000000.000000 (many, many zeroes)!
What' wrong?
The number() function works correctly in these cases.

Stephan
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stephan.otte@pcc.de