<!--
  * dtd/bic21subjects.dtd
  *
  * Copyright (c) 2014-2021 Simon Fraser University
  * Copyright (c) 2000-2021 John Willinsky
  * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
  *
  * DTD for BIC 2.1 Subject lists.
  *
  -->
<!ELEMENT subjects (subject+)>
<!ELEMENT subject EMPTY>
	<!ATTLIST subject 
		code CDATA #REQUIRED
		text CDATA #REQUIRED>