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<Settings> <Channels> <Channel Name="R1" Voltage="100" Test="1"/> ... <Channel Name="L360" Voltage="120" Test="1"/> </Channels> </Settings>
if($root->findnodes('/Settings/Channels/Channel/Name="L1"')){ #<-Chan +nel name = "L1" my ($L1value) = $root->findnodes('/Settings/Channels/Channel/Name="L1 +" @Voltage[.="400"]'); $L1value->setValue(300); }