You can also use XML::XSH2's stream command that doesn't load the whole document into memory. 
stream :f input.xml
       :F output.xml
       select (dobs | dob) {
           rm ../* ;
       }

[download]

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re: XML:twig XML wrong by choroba
in thread XML:twig XML wrong by nico38100

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