This document defines a registry of identifier schemes for use in the Package Document opf:scheme attribute.

This document is subject to change at any time. The terms defined herein will never be removed, but may be deprecated.

Any use of terms marked [draft] should be considered experimental.

Deprecated term are identified by the label [deprecated]. These terms are no longer recommended for use.

Terms without a label are considered stable.

Identifier Schemes

DOI

A Digital Object Identifier.

<dc:identifier opf:scheme="doi">doi:10.1016/j.iheduc.2008.03.001</dc:identifier>
ISBN

An International Standard Book Number.

<dc:identifier opf:scheme="isbn">9780000000001</dc:identifier>
<dc:identifier opf:scheme="isbn">urn:isbn:9780000000001</dc:identifier>
JDCN

A Japan Digital Comic Number.

<dc:identifier opf:scheme="jdcn">915869090000000000DD</dc:identifier>
UUID

A Universally-Unique Identifier (also referred to as a GUID).

<dc:identifier opf:scheme="uuid">50f9f8b1-8a81-4dd5-b104-0766188d7d2c</dc:identifier>
<dc:identifier opf:scheme="uuid">urn:uuid:a1b0d67e-2e81-4df5-9e67-a64cbe366809</dc:identifier>