考虑以下 xml
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns="mycompany.com.myservice">
<soap:Header>
<To xmlns="http://schemas.microsoft.com/ws/2005/05/addressing/none">http://mycompany.com/myservice</To>
<Action xmlns="http://schemas.microsoft.com/ws/2005/05/addressing/none">mycompany.com/myservice/dosomething</Action>
</soap:Header>
<soap:Body>
<mypayload>hello world</mypayload>
</soap:Body>
</soap:Envelope>
使用多个无别名的默认命名空间是否有效?