How to logstash filter xml

Elastic Stack Logstash
6

With that XML you could use

xml { source => "message" target => "theXML" force_array => false remove_field => [ "message" ] }
mutate {
    add_field => {
        "LogID" => "%{[theXML][TransferLogDetailForExport][LogID]}"
        "LogDateTime" => "%{[theXML][TransferLogDetailForExport][LogDateTime]}"
    }
}
split { field => "[theXML][Vouchers]" }
ruby {
    code => '
        event.get("[theXML][Vouchers]").each { |k, v| event.set(k, v) }
        event.remove("[theXML]")
    '
}

to produce

{
    "VoucherID" => "2",
  "LogDateTime" => "2020-01-07T17:00:47",
   "@timestamp" => 2020-01-20T21:39:34.862Z,
"VoucherTypeID" => "24",
         "Used" => "1",
   "ComputerID" => "0",
        "LogID" => "15237"
}
{
    "VoucherID" => "3",
  "LogDateTime" => "2020-01-07T17:00:47",
   "@timestamp" => 2020-01-20T21:39:34.862Z,
"VoucherTypeID" => "24",
         "Used" => "1",
   "ComputerID" => "0",
        "LogID" => "15237"
}

etc.