Re: [xsl] Obtaining a node's schema type

[Michael Kay <mike@xxxxxxxxxxxx>]

There's no standard function to get the type annotation name of a node; 
the nearest thing is that you can test whether the node is of type X (or 
a subtype of X) using "instance of". Saxon fills this gap with 
saxon:type-annotation(). I'm not sure I can present the case why the WG 
decided not to provide such a function, but the essence of the argument 
is probably that implementations always have freedom to use a subtype, 
which might not be meaningful to the user, and might not be 
interoperable - for example the result of 3+3 is specified in the spec 
to be xs:integer, but an implementation might use xs:positiveInteger, or 
xs:int, or my:integer-in-range-4-to-8, provided these are subtypes of 
xs:integer.

Michael Kay
Saxonica

On 26/07/2010 11:04, Wolfgang Laun wrote:
> Given an XPath denoting a "leaf" element or an attribute of the input
> XML and that the XML Schema describing this document is available, I'd
> like to obtain the XML Schema type of that item. I think that I can
> implement such a function (for this particular application) without
> spraining too many synapses, but, being lazy:
>
> - Is such a function (XSLT 2.0) freely available, and where?
>
> - Would this be an out-of-the-box function of a schema-aware XSLT processor?
>
> Regards
> Wolfgang