[R] extract data.table from XML

[YuriWerewolf]

Hi to all members of this list,

i'm trying to parse an XML file and it seems that it's not very
straightforward. I managed to get to the node that has a lot of sub nodes
with similar format, i.e. :
 $Purchase
<Purchase>
 <Price>-2000.1</Price>
 <Volume>29510.27</Volume>
</Purchase>

$Purchase
<Purchase>
 <Price>-2000</Price>
 <Volume>29507.26</Volume>
</Purchase>

I was wondering what is the way to process it in the fast and efficient way,
i.e. not by looping through each sub-node.

Thanks
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