WSDL消息名称之间有什么区别

Question

假设我们有一个简单的Web服务，其中包含以下WSDL：

<?xml version="1.0"?>
<wsdl:definitions name="HelloWorld" targetNamespace="http://codenotfound.com/services/helloworld" xmlns:tns="http://codenotfound.com/services/helloworld"
  xmlns:types="http://codenotfound.com/types/helloworld" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">

  <wsdl:types>
    <xsd:schema targetNamespace="http://codenotfound.com/types/helloworld" xmlns:xsd="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified"
      attributeFormDefault="unqualified" version="1.0">

      <xsd:element name="person">
        <xsd:complexType>
          <xsd:sequence>
            <xsd:element name="firstName" type="xsd:string" />
            <xsd:element name="lastName" type="xsd:string" />
          </xsd:sequence>
        </xsd:complexType>
      </xsd:element>

      <xsd:element name="greeting">
        <xsd:complexType>
          <xsd:sequence>
            <xsd:element name="greeting" type="xsd:string" />
          </xsd:sequence>
        </xsd:complexType>
      </xsd:element>
    </xsd:schema>
  </wsdl:types>

  <wsdl:message name="SayHelloInput">
    <wsdl:part name="person" element="types:person" />
  </wsdl:message>

  <wsdl:message name="SayHelloOutput">
    <wsdl:part name="greeting" element="types:greeting" />
  </wsdl:message>

  <wsdl:portType name="HelloWorld_PortType">
    <wsdl:operation name="sayHello">
      <wsdl:input message="tns:SayHelloInput" />
      <wsdl:output message="tns:SayHelloOutput" />
    </wsdl:operation>
  </wsdl:portType>

  <wsdl:binding name="HelloWorld_SoapBinding" type="tns:HelloWorld_PortType">
    <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http" />
    <wsdl:operation name="sayHello">
      <soap:operation soapAction="http://codenotfound.com/services/helloworld/sayHello" />
      <wsdl:input>
        <soap:body use="literal" />
      </wsdl:input>
      <wsdl:output>
        <soap:body use="literal" />
      </wsdl:output>
    </wsdl:operation>
  </wsdl:binding>

  <wsdl:service name="HelloWorld_Service">
    <wsdl:documentation>Hello World service</wsdl:documentation>
    <wsdl:port name="HelloWorld_Port" binding="tns:HelloWorld_SoapBinding">
      <soap:address location="http://localhost:8080/codenotfound/ws/helloworld" />
    </wsdl:port>
  </wsdl:service>

</wsdl:definitions>

让我们还假设我有一个开发的客户端，可以毫无问题地使用所有公开的服务。

但是，如果您现在更改由此暴露的wsdl：

<?xml version="1.0"?>
<wsdl:definitions name="HelloWorld" targetNamespace="http://codenotfound.com/services/helloworld" xmlns:tns="http://codenotfound.com/services/helloworld"
  xmlns:types="http://codenotfound.com/types/helloworld" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">

  <wsdl:types>
    <xsd:schema targetNamespace="http://codenotfound.com/types/helloworld" xmlns:xsd="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified"
      attributeFormDefault="unqualified" version="1.0">

      <xsd:element name="person">
        <xsd:complexType>
          <xsd:sequence>
            <xsd:element name="firstName" type="xsd:string" />
            <xsd:element name="lastName" type="xsd:string" />
          </xsd:sequence>
        </xsd:complexType>
      </xsd:element>

      <xsd:element name="greeting">
        <xsd:complexType>
          <xsd:sequence>
            <xsd:element name="greeting" type="xsd:string" />
          </xsd:sequence>
        </xsd:complexType>
      </xsd:element>
    </xsd:schema>
  </wsdl:types>

  <wsdl:message name="HelloInput">
    <wsdl:part name="person" element="types:person" />
  </wsdl:message>

  <wsdl:message name="HelloOutput">
    <wsdl:part name="greeting" element="types:greeting" />
  </wsdl:message>

  <wsdl:portType name="HelloWorld_PortType">
    <wsdl:operation name="sayHello">
      <wsdl:input message="tns:HelloInput" />
      <wsdl:output message="tns:HelloOutput" />
    </wsdl:operation>
  </wsdl:portType>

  <wsdl:binding name="HelloWorld_SoapBinding" type="tns:HelloWorld_PortType">
    <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http" />
    <wsdl:operation name="sayHello">
      <soap:operation soapAction="http://codenotfound.com/services/helloworld/sayHello" />
      <wsdl:input>
        <soap:body use="literal" />
      </wsdl:input>
      <wsdl:output>
        <soap:body use="literal" />
      </wsdl:output>
    </wsdl:operation>
  </wsdl:binding>

  <wsdl:service name="HelloWorld_Service">
    <wsdl:documentation>Hello World service</wsdl:documentation>
    <wsdl:port name="HelloWorld_Port" binding="tns:HelloWorld_SoapBinding">
      <soap:address location="http://localhost:8080/codenotfound/ws/helloworld" />
    </wsdl:port>
  </wsdl:service>

</wsdl:definitions>

也就是说，仅更改了WSDL规范中消息的名称。也就是说，将<wsdl:message name="SayHelloInput">更改为<wsdl:message name="HelloInput">，将<wsdl:message name="SayHelloOutput">更改为<wsdl:message name="HelloOutput">。现在的问题是：这两个Web服务版本之间有什么区别？如果如上例所示更改了WSDL，它将对保持不变的客户端产生什么影响？

非常感谢！