On Fri, Jun 01, 2007 at 05:14:46PM +0200, Ying Zhang wrote:
> [...]
>
> But then problem happens, namely, when the server calls the function
> 'xquery_sig_match' (in pathfinder.mx), it concludes that
> xs:untypedAtomic is not a sub-type of xs:string, hence, the function
> signature can not be resolved.
>
> This error does not occur if the function 'q2' is called without XRPC.
> So, what is the trick of pathfinder to match the signature? Is
> xs:untypedAtomic just treated the same as xs:string?
Hi Jennie,
the keywords to look for in the Formal Semantics are "type promotion"
and "function call". And there are the function conversion rules as
implemented in core/fs.brg:function_conversion().
Sorry for my very brief answer, but these pointers should bring you
quite far.
Jens
--
Jens Teubner
Technische Universitaet Muenchen, Department of Informatics
D-85748 Garching, Germany
Tel: +49 89 289-17259 Fax: +49 89 289-17263
I invented <Ctrl><Alt><Delete>, but Bill Gates made it famous.
-- David Bradley, member of the original IBM PC design team
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