<?php
define('IN_CB', true);
include('include/header.php');
registerImageKey('code', 'BCGisbn');
$characters = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9');
?>
<div id="validCharacters">
<h3>Valid Characters</h3>
<?php foreach ($characters as $character) { echo getButton($character); } ?>
</div>
<div id="explanation">
<h3>Explanation</h3>
<ul>
<li>ISBN stands for International Standard Book Number.</li>
<li>ISBN type is based on EAN-13.</li>
<li>Previously, all ISBN were in EAN-10 format. EAN-13 uses the same encoding but may contain different data in the ISBN number.</li>
<li>Composed by a GS1 prefix (for ISBN-13), a group identifier, a publisher code, an item number and a check digit.</li>
</ul>
</div>
<?php
include('include/footer.php');
?>
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