[ 
https://issues.apache.org/jira/browse/AXIS-2682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12515379
 ] 

Tom Jordahl commented on AXIS-2682:
-----------------------------------

The construct
  <data xmlns="">foo</data>
Is to make the <data> element unqualified.  Since the element above 
(<AcceptBase64>) defined a default namespace, in order to remove the data 
element from that default namespace, Axis emits the xmlns="".  This is 
perfectly legal.

See http://www.w3.org/TR/xml-names/#defaulting - Section 6.2 Namespace 
defaulting.

I don't think there is a bug here...


> wsdl2Java generates invalid empty string namespaces
> ---------------------------------------------------
>
>                 Key: AXIS-2682
>                 URL: https://issues.apache.org/jira/browse/AXIS-2682
>             Project: Axis
>          Issue Type: Bug
>          Components: WSDL processing
>    Affects Versions: 1.4
>         Environment: Eclipse 3.2 on Mac OS 10.4.10 (Intel)
>            Reporter: Christoph Ludwig
>         Attachments: bytearray.wsdl
>
>
> I generated with WSDL2Java a service skeleton and client stubs for the 
> attached WSDL which I used for interoperability tests. When I investigated 
> errors, I found the following in the generated SOAP request:
>   <?xml version="1.0" encoding="UTF-8"?>
>      <soapenv:Envelope 
> xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"; 
> xmlns:xsd="http://www.w3.org/2001/XMLSchema"; 
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
>         <soapenv:Body>
>            <AcceptBase64 xmlns="http://www.textgrid.de/tests/bytearray/";>
>               <data xmlns="">SGVsbG8gV29ybGQh</data>
>               <length xmlns="">12</length>
>            </AcceptBase64>
>         </soapenv:Body>
>      </soapenv:Envelope>
> Note the empty namespaces in the data and length elements. The W3C 
> recommendation "Namespaces in XML 1.0" states explicitly: "The empty string, 
> though it is a legal URI reference, cannot be used as a namespace name" 
> (http://www.w3.org/TR/xml-names/#iri-use). 

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