From: Brian Candler <b.candler@...>
Date: 2010-03-17T04:33:28+09:00
Subject: Re: WSDL Interface to EPO (European Patent Office)

Axel Fuchs wrote:
> Hi,
> I am trying to do patent searches accessing the webservice at the
> European patent office
> (www.ops.epo.org/patents/patent-information/free/open-patent-services.html).

$ curl -v 
http://www.ops.epo.org/patents/patent-information/free/open-patent-services.html
* getaddrinfo(3) failed for www.ops.epo.org:80
* Couldn't resolve host 'www.ops.epo.org'
* Closing connection #0
curl: (6) Couldn't resolve host 'www.ops.epo.org'

$ dig www.ops.epo.org. a
...
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN,

So it looks like that link is bad (authoritative non-existent domain 
answer)

> Here is the code I wrote:

I suggest you follow the steps on the other thread:

- ensure you're using the gem soap4r, not the bundled one
    require 'rubygems'
    gem 'soap4r'
    require 'soap/wsdlDriver'

- build interface classes using wsdl2ruby.rb

- get a wiredump

> Questions: How do I access the elements in result?

- run it in irb and use inspection to look at the available methods

> What do I do about this error message:

/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rexml/parsers/baseparser.rb:371:in
> `pull': The 'xml' prefix must not be bound to any other namespace
> (http://www.w3.org/TR/REC-xml-names/#ns-decl) (REXML::ParseException)

This suggests they're sending back invalid XML or that the WSDL has 
invalid XML, but we'd need to see a wiredump exchange and/or the WSDL.
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