Setting up subreport in iReport using XML datasource

Can anyone explain in details (if possible, with screenshots) how to add a subreport (one to many relation)

This being the xml data source

<addressbook>
 <category name="home">
  <person id="1">                                                           
      <LASTNAME>Davolio</LASTNAME>
      <FIRSTNAME>Nancy</FIRSTNAME>
      <hobbies>
       <hobby>Radio Control</hobby>
       <hobby>R/C Cars</hobby>
       <hobby>Micro R/C Cars</hobby>
       <hobby>Die-Cast Models</hobby>
      </hobbies>
      <email>email1@my.domain.it</email>
      <email>email2@my.domain2.it</email> 

  </person>
  <person id="2">
      <LASTNAME>Fuller</LASTNAME>
      <FIRSTNAME>Andrew</FIRSTNAME>
      <email>email3@my.domain3.it</email> 
      <email>email4@my.domain4.it</email> 
  </person>
  <person id="3">                                                                 
      <LASTNAME>Leverling</LASTNAME>
      <FIRSTNAME>Janet</FIRSTNAME>
      <hobbies>
       <hobby>Rockets</hobby>
       <hobby>Puzzles</hobby>
       <hobby>Science Hobby</hobby>
       <hobby>Toy Horse</hobby> 
      </hobbies>
      <email>email45@my.domain3.it</email> 
      <email>email455@my.domain4.it</email> 
  </person>
 </category>
 <category name="work">    
  <person id="4">                                                            
      <LASTNAME>Peacock</LASTNAME>
      <FIRSTNAME>Margaret</FIRSTNAME>
      <hobbies>
       <hobby>Toy Horse</hobby> 
      </hobbies>
      <email>Peacock@margaret.com</email>  
  </person>
  <person id="5">
      <LASTNAME>Buchanan</LASTNAME>
      <FIRSTNAME>Steven</FIRSTNAME>
      <hobbies>
      </hobbies>
      <email>Buchanan@steven.com</email>  
  </person>
  <person id="6">
      <LASTNAME>Suyama</LASTNAME>
      <FIRST开发者_如何学CNAME>Michael</FIRSTNAME>
  </person>
  <person id="7">
      <LASTNAME>King</LASTNAME>
      <FIRSTNAME>Robert</FIRSTNAME>
  </person>
 </category>
 <category name="Other">    
  <person id="8">   
      <LASTNAME>Callahan</LASTNAME>
      <FIRSTNAME>Laura</FIRSTNAME>
      <email>email25@my.domain3.it</email> 
  </person>
  <person id="9">
      <LASTNAME>Dodsworth</LASTNAME>
      <email>Dodsworth@my.anne.it</email> 
  </person>
 </category>                                                           
</addressbook>

This page here has exactly what you need:

http://jasperforge.org/plugins/espforum/view.php?group_id=83&forumid=101&topicid=48534

Basically some guy was trying to do exactly what you're doing (with the same page and everything) and had the same problem. Awesomely enough, he pasted in his XML datasource and his master and subreport JRXML files. View his code to see how he did it, then use the <datasourceExpression> syntax the second comment suggests to get things going.