Item for <manifest> element of OPF file. Each describes a document, an image file, a style sheet, or other component that is considered part of the publication
%opts is an anonymous hash that might containe followig keys:
id href media_type
Encode object to XML form using XML::Writer instance
Get/set ID of OPS Content Document to which item refers
Get/set URI of OPS Content Document to which item refers
Get/set item’s MIME media type.
Oleksandr Tymoshenko, <email@example.com>
Please report any bugs or feature requests to <firstname.lastname@example.org>
Copyright 2009, 2010 Oleksandr Tymoshenko.
This module is free software; you can redistribute it and/or modify it under the terms of the BSD license. See the LICENSE file included with this distribution.