Re: [xsl] What the default datatype of an stylesheet parameter ?

[Michael Kay <mike@xxxxxxxxxxxx>]

This is outside the scope of the XSLT specification, and depends on the 
designer of the API. In Saxon, arguments are passed as xs:untypedAtomic 
values, and are then converted to the required type (if declared) using 
the standard function conversion rules. This means that if you declare 
the value as xs:integer (say), and pass the untypedAtomic value "3", it 
will be converted to an integer; if you declare the expected type as 
xs:boolean, then you can pass true, false, 0 or 1. If you don't declare 
the required type, the value will remain as an xs:untypedAtomic value - 
which is why ($foo instance of xs:string) is false.

Michael Kay
Saxonica


On 24/11/2011 20:19, Matthieu Ricaud-Dussarget wrote:
> Hi all,
>
> 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"/>
>
> I was really astonished to see that
> $foo instance of xs:string
> returns false()
>
> I then typed the parameter :
> <xsl:param name="foo" as="xs:string"/>
> and got true()
>
> What was the type of $foo before I casted it with as="xs:string" ?
> Has it any type ...?
>
> Thank for your lightening me :-)
>
> Cheers,
>
> Matthieu
>
> PS : my bookmarks about that topic :
> http://www.dpawson.co.uk/xsl/rev2/datatypes.html
> http://www.w3.org/TR/xmlschema-2/#built-in-datatypes