Hiya,

could someone please show me how in xslt (1.0) i can calculate the persons age - in my xml structure i have defined element <dob>YYYY-MM-DD</dob>

thank you.

Consider using the date/time handling library available at www.exslt.org. Many of the functions described in this library are available as templates which you can simply include into your stylesheet.

__________________
Michael Kay
http://www.saxonica.com/
Author, XSLT 2.0 and XPath 2.0 Programmer\'s Reference

in the stylesheet header im calling:
xmlns:ex="http://exslt.org/dates-and-times" extension-element-prefixes="ex"

in the template i now have following parameters declared:

<xsl:param name="dobyear" select="substring((dob),1,4)" /> //this is getting the YYYY in my dob element
<xsl:param name="currentyear" select="ex:year()" /> //this gets current year

the subtraction is:

<xsl:value-of select="round($currentyear - $dobyear)" />

in my output i am getting NaN ? expecting numerical value i.e. difference between those two values. What am i doing wrong?

thank you.

I don't know, I'm afraid. There's nothing wrong with these fragments of code, so the bug is somewhere in the code you haven't shown us.

__________________
Michael Kay
http://www.saxonica.com/
Author, XSLT 2.0 and XPath 2.0 Programmer\'s Reference

Suggest you explicitly output both values immediately before the calculation to make sure they are what you expect. If that doesn't help post an example we can test for ourselves.

__________________
Joe
http://joe.fawcett.name/