Join operation removes duplicates

[ewoutkramer]

[28-8-2016 12:53:59] Brian Postlethwaite:

<name>
<given value="bobs"/>
<given value="bobs"/>
<given value="bob2"/>
<family value="f1"/>
<family value="f2"/>
</name>
<birthDate value="1973"/>
</Patient>

[28-8-2016 12:54:05 | Edited 12:54:12] Brian Postlethwaite: name.given | name.family
[28-8-2016 12:54:20] Brian Postlethwaite: removes all the duplicates.
[28-8-2016 12:54:47] Brian Postlethwaite: which makes adding distinct() not possible.