d3.org/dummy/ufid.html" should be used for tests. The
'Owner identifier' must be non-empty (more than just a termination).
The 'Owner identifier' is then followed by the actual identifier,
which may be up to 64 bytes. There may be more than one "UFID" frame
in a tag, but only one with the same 'Owner identifier'.
<Header for 'Unique file identifier', ID: "UFID">
Owner identifier <text string> $00
Identifier
<up to 64 bytes binary data>
@author Eric Farng
@version $Revision: 1.4 $