databricks spark XML Writer

RobsonNLPT
Contributor III

Hi.

I'm trying to generate XML as output base on my nested dataframe. Everything is ok except by I don't know how to add elements to rootTag.

I can add elements from rowtag but not in rootTag. Same problems to add attributes to root 

<books  version = "5.2">
 <library>"LIB1"</library>
 <book id="bk103">
  <author>Corets, Eva</author>
  <title>Maeve Ascendant</title>
 </book>
 <book id="bk104">
  <author>Corets, Eva</author>
  <title>Oberon's Legacy</title>
 </book>
</books>

any help?