<message name="getWeatherRequest">
      <part name="zipcode" type="xsd:string"/>
   </message>
   <message name="getWeatherResponse">
      <part name="temperature" type="xsd:int"/>
   </message>

   <portType name="Weather_PortType">
      <operation name="getWeather">
         <input message="tns:getWeatherRequest"/>
         <output message="tns:getWeatherResponse"/>
      </operation>
   </portType>
   
   <binding name="Weather_Binding" type="tns:Weather_PortType">
      <soap:binding style="rpc"
         transport="http://schemas.xmlsoap.org/soap/http"/>
      <operation name="getWeather">
         <soap:operation soapAction=""/>
         <input>
            <soap:body
               encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
               namespace="urn:examples:weatherservice"
               use="encoded"/>
         </input>
         <output>
            <soap:body
               encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
               namespace="urn:examples:weatherservice"
               use="encoded"/>
         </output>
      </operation>
   </binding>

   <service name="Weather_Service">
      <documentation>WSDL File for Weather Service</documentation>
      <port binding="tns:Weather_Binding" name="Weather_Port">
         <soap:address
            location="http://localhost:8080/soap/servlet/rpcrouter"/>
      </port>
   </service>
</definitions>
1.targetNamespace="http://www.ecerami.com/wsdl/WeatherService.wsdl"是不是就是定义本文件的空间的？那还要那个xmlns:tns="http://www.ecerami.com/wsdl/WeatherService.wsdl"干嘛？那个tns是干什么用的哪？
2.xmlns:xsd="http://www.w3.org/2001/XMLSchema"，后面那段URI由谁来验证正确性哪？java的xml解析器？
我怎么知道该写2001还是1999哪？
3.encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"为何要这样写？在此文件开头定义好不行吗？也有解析器来识别这个吗？匹配成什么阿？