<?xml version="1.0" encoding="UTF-8"?>
<package xmlns="http://www.idpf.org/2007/opf" xmlns:dc="http://purl.org/dc/elements/1.1/" version="3.0" profile="http://www.idpf.org/epub/30/profile/package/" xml:lang="en" unique-identifier="pub-id">
 <metadata>
  <dc:identifier id="pub-id">  foo   </dc:identifier>
 </metadata>
</package>
