Java XML to SOAP

i have the following issue:

I get a XML-file (let's call it input.xml) from an IBM Rule Execution Server. It looks something like this:

person :

<?xml version="1.0" encoding="UTF-8"?><de.example.demo.Person xmlns:xsi="http://ift.tt/1iVD8i8">
<_age>
<int>20</int>
</_age>
<_job>
<_Jobs xomValue="Consultant"/>
</_job>
<job>
<string>Consultant</string>
</job>
<birthDate>
<ilog.rules.xml.types.IlrDate>1999-01-01</ilog.rules.xml.types.IlrDate>
</birthDate>
<surname>
<string>Doe</string>
</surname>
<schufaTokenList>
<vector/>
</schufaTokenList>
<prename>
<string>John</string>
</prename>
</de.example.demo.Person>

blacklist :

<?xml version="1.0" encoding="UTF-8"?><null xmlns:xsi="http://ift.tt/1iVD8i8"/>

And i have to put these values, in a SOAP-Request. I have already archieved to generated a XML-file by the reference of the WSDL-file (i have access to it) and using soapUI in java (requestTemplate.xml). It looks like this:

<soapenv:Envelope xmlns:soapenv="http://ift.tt/sVJIaE" xmlns:scor="http://ift.tt/1lXttcb" xmlns:par="http://ift.tt/WMDMDV" xmlns:demo="http://ift.tt/WMDMUh">
   <soapenv:Header/>
   <soapenv:Body>
      <scor:ScoringDemoRequest>
         <!--Optional:-->
         <scor:DecisionID>?</scor:DecisionID>
         <!--Zero or more repetitions:-->
         <scor:blacklist>?</scor:blacklist>
         <par:person>
            <person>
               <demo:prename>?</demo:prename>
               <demo:surname>?</demo:surname>
               <demo:birthDate>?</demo:birthDate>
               <demo:job>?</demo:job>
               <!--Zero or more repetitions:-->
               <demo:schufaToken>
                  <demo:code>?</demo:code>
                  <demo:status>?</demo:status>
                  <demo:score>?</demo:score>
               </demo:schufaToken>
            </person>
         </par:person>
      </scor:ScoringDemoRequest>
   </soapenv:Body>
</soapenv:Envelope>

The problem i have with this, is the following: The input.xml is not the same. It can look totally different from this one. How do i archieve that, that i fill the data from input.xml to requestTemplate.xml?

Since i'm pretty new to SOAP and XML, i don't know how to access the nodes without knowing their name.

The output XML-file should look like this:

<soapenv:Envelope xmlns:soapenv="http://ift.tt/sVJIaE" xmlns:scor="http://ift.tt/1lXttcb" xmlns:par="http://ift.tt/WMDMDV" xmlns:demo="http://ift.tt/WMDMUh">
   <soapenv:Header/>
   <soapenv:Body>
      <scor:ScoringDemoRequest>
         <!--Optional:-->
         <scor:DecisionID>?</scor:DecisionID>
         <!--Zero or more repetitions:-->
         <scor:blacklist>?</scor:blacklist>
         <par:person>
            <person>
               <demo:prename>John</demo:prename>
               <demo:surname>Doe</demo:surname>
               <demo:birthDate>1999-01-01</demo:birthDate>
               <demo:job>Consultant</demo:job>
            </person>
         </par:person>
      </scor:ScoringDemoRequest>
   </soapenv:Body>
</soapenv:Envelope>

Thanks for your help! :-)