single precision bug

Hi there,

I have run into something people here call the "single precision bug"

A rather large XML file containing all kinds of financ. information is being
validated using schematron.

the test I do is as follows:

totalDebit = sum(.//debitAmount)"

meaning: there is an element named totalDebit that should have the same
value as the sum of all debitamount elements in the file.

I happen to know this is the case, the test however fails.

A better inspection learns me that the XSLT processor makes a mistake here
totalDebit - sum(./debitAmount) gives me a value of:

-0.00000000005820766091346741 whereas this should be 0.

MsXML, Saxon,Xalan, XT all have this error only Sablotron returns the
correct value.

What do you all think of this?

Cheers

Ronald





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