CODEWITHSUNDEEP
xmlxsltxpath
John Tracid
John Tracid

Reputation: 4046

String value for arithmetic XPath expression

I found different result for following XSL transformation.

XSL:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:template match="test">
        <xsl:variable name="p1" select="a/@p1"/>
        <xsl:variable name="p2" select="a/@p2"/>
        <xsl:variable name="p3" select="a/@p3"/>

        <xsl:value-of select="$p1+$p2*$p3"/><br />
        <xsl:value-of select="$p2*$p3+$p1"/>
    </xsl:template>
</xsl:stylesheet>

XML:

<test>
    <a p1="1458569700" p2="60" p3="60"/>
</test>

libxslt:

<?xml version="1.0"?>
1458573300<br/>1458573300

Some kind of Java library (http://xslttest.appspot.com):

<?xml version="1.0" encoding="UTF-8"?>1.4585733E9<br/>1.4585733E9

Who is correct and why (reference to specification would be great)?

Upvotes: 0

Views: 132

Answers (1)

michael.hor257k
michael.hor257k

Reputation: 116959

Both results are "correct" mathematically. In terms of standards, XSLT 1.0 does not allow scientific notation, but XSLT 2.0 does.

XPath 1.0:

https://www.w3.org/TR/xpath/#exprlex production [30]

XPath 2.0:

The rules for converting numbers to strings have changed. These may affect the way numbers are displayed in the output of a stylesheet. For numbers whose absolute value is in the range 1E-6 to 1E+6, the result should be the same, but outside this range, scientific format is used for non-integral xs:float and xs:double values.

https://www.w3.org/TR/xpath20/#id-incompat-in-true-mode

Upvotes: 1

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