[Xml-compile] How to debug schema problems

[Mark Overmeer]

* Uwe Voelker (uwe at uwevoelker.de) [130407 09:02]:
> I'm using XML::Compile::WSDL11 to access a webservice. It is working fine
> for a lot of the calls. But one call returns:
>    error: element `...' not processed at ...
> 
> I'm guessing this is an error in the schema, as I already fixed two other
> mistakes. But I have a very hard time to find this. It occurs in a
> complexType. What can I do to better locate this error?

That's a very difficult problem, in general.  It is either a problem
with the element which is not processed, or the one before it.

Features like repetition, optional, choices and substitutionGroups
are really hiding the real cause of the mis-match.  For instance,
when there is a choice between 4 complex elements, and one of those
should actually match but fails somewhere 4 levels deep in that
alternative, then the failure on the choice level fails.

> Do you have any suggestions for me?

When the problem is 'deep', then it is caught by a try() in choice
or substitutionGroups.  Example:
    my @d = try { $specials{$_}->($tree) };
    next if $@;

It may help to add:   warn $@ if $@;    inbetween.

> How can I feed the XML I got from the server as file/string into
> XML::Compile? So I could edit the XML and the schema and maybe narrow the
> error down.

Narrowing down without invalidating the message is often hard.  It requires
a lot of knowledge from the schema.  Examples how to test returns
locally can be found in the test-scripts of the distribution, for instance
t/50wsdl.t  (fake_server)

You may also produce a template   $wsdl->template(XML => $type)
and the manually match the produced example with the message you have
recieved.

> PS: Unfortunately the schema is not public, otherwise I would have given
> you a complete example. Sorry.

You may send it off-list.
-- 
Regards,

               MarkOv

------------------------------------------------------------------------
       Mark Overmeer MSc                                MARKOV Solutions
       Mark at Overmeer.net                          solutions at overmeer.net
http://Mark.Overmeer.net                   http://solutions.overmeer.net