Re: [xsl] Bug in format-number ? Unexpected rounding

["G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>]

At 2010-09-02 22:46 +0200, David Guerrero wrote:
> We are having a strange behaviour in XSLT having some weird rounding 
> of integer values when displaying them through "format-number()" 
> function. I happens with serveral numbers and with different numbers 
> of decimals.
>
> Is this the expected behaviour ?

You are experiencing explainable behaviour because of the binary 
representation of decimal numbers.  When looking at powers of two, 
they don't always hit decimal numbers bang on.

> We are using recent versions of libxmls2 (2.7.4) and libxslt 
> (1.1.26), and PHP (5.3.3). Anyhow the results are the same with xsltproc.

My recollection is that xsltproc supports only XSLT 1.0.

When using XSLT 2.0 one uses the xsd:decimal() cast of values so that 
the internal representation isn't binary and this problem goes away.

I hope this helps.

. . . . . . . . . . . Ken


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