{
    File => {
        Header => {
            Contents => { Dictionary => {}, Flags => {}, Properties => {} },
            Key => { physical => {} },
            Precision => { Dec => { value => 1 }, Units => { value => "mil" } },
            Revision => { 
                "log" => { value => 0 }, 
                oth => { value => 0 }, 
                phy => { value => 0 } 
            },
            Version => { "1.0" => {} },
        },
        value  => "\"foo\"",
    },
}