C:\test>874313
{
    File => {
        Header => {
            Contents => { Dictionary => {}, Flags => {}, Properties => {} },
            Key => { value => "physical" },
            Precision => { Dec => { value => 1 }, Units => { value => "mil" } },
            Revision => { 
                "log" => { value => 0 }, 
                oth => { value => 0 }, 
                phy => { value => 0 } 
            },
            Version => { value => "1.0" },
        },
        value  => "\"foo\"",
    },
}


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