Solr Document inside the document

[Siva Prasad Janapati]

Hi,
 
I have a requirement where i need to create document inside the document. For 
example,
 
<document>
........
.......
<document>
.......
.......
</document>
 
.........
 
</document>
 
Is there any way to configure the document like this?
 
Regards,
Siva
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