Thank you for your as-always clear explanation Michael.
I work more and more with strong datatype in XSLT2, which make the code
stronger, I'll do always declare a datatype pour stylesheet params.. and
as I always use Saxon I know how it behaves now.
Really usefull tip for boolean parameters !
After testing this, let me just add that the if the supply parameter
cannot be casted to the declared type, saxon raise an error.
I don't know how other xslt processors behaves in regard to this point,
and sorry that my question is a bit "implementation dependant".
Thank you for your response Ken, but as said Michael my question was
about "always supplied parameters".
But this make me think about another question : if no parameters is
supplied, I'm use to test it againts empty string with
<xsl:if test="$foo=''"/>
and it usually works.
Is an empty sequence equal to an emty string?
(maybe the equal operator tries to cast both part to the same type ?
Regards,
Matthieu.
Le 25/11/2011 01:06, Michael Kay a écrit :
On 24/11/2011 23:31, G. Ken Holman wrote:
At 2011-11-24 21:19 +0100, Matthieu Ricaud-Dussarget wrote:
When sending a parameter to the stylesheet( from command line with
saxon for example), I thought it was always a string (which is a
pitty when you need boolean parameter).
I made a simple test, sending "bar" to parameter foo :
<xsl:param name="foo"/>
In XSLT 1, that is, indeed, an empty string as you anticipated. In
XSLT 2, however, that is the declaration of an empty sequence.
I think Ken is answering a different question - what is the default
value of the parameter? If you don't supply a value, $foo will indeed
be the empty sequence.
Michael Kay
Saxonica
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