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<title>Referential integrity in the DTD editor</title>
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<h1 class="topictitle1">Referential integrity in the DTD editor</h1>
<div><p>The DTD editor has a built-in mechanism to handle referential integrity
issues. When you delete or rename certain nodes, clean up for any nodes affected
will automatically occur.</p><div class="skipspace">The following table describes the clean up that occurs when you delete
or rename certain nodes.</div>
<div class="skipspace"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><thead align="left"><tr><th valign="top" id="d0e21"> Action taken</th>
<th valign="top" id="d0e23"> Clean up </th>
</tr>
</thead>
<tbody><tr><td valign="top" headers="d0e21 ">An element is renamed.</td>
<td valign="top" headers="d0e23 ">All references to that element will be renamed.</td>
</tr>
<tr><td valign="top" headers="d0e21 ">An external parameter entity is renamed.</td>
<td valign="top" headers="d0e23 ">Any external parameter entity references to it will be renamed.</td>
</tr>
<tr><td valign="top" headers="d0e21 ">A notation is renamed.</td>
<td valign="top" headers="d0e23 ">All references to the notation will be renamed.</td>
</tr>
<tr><td valign="top" headers="d0e21 ">An element is deleted.</td>
<td valign="top" headers="d0e23 ">All references to that element will be cleaned up or reset. The original
element will be removed from the DTD file, and any references to it will be
reset to the next available element. If there are no elements available, references
to it will be reset to (#PCDATA).</td>
</tr>
<tr><td valign="top" headers="d0e21 ">An external parameter entity is deleted.</td>
<td valign="top" headers="d0e23 ">Any external parameter entity references to it will automatically be
deleted.</td>
</tr>
<tr><td valign="top" headers="d0e21 ">A notation is deleted.</td>
<td valign="top" headers="d0e23 ">All references to the notation will be removed.</td>
</tr>
</tbody>
</table>
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<p>
<b class="parentlink">Parent topic:</b> <a href="../topics/tremvelm.html" title="If you have created elements, attributes, entities, notations, and comments you no longer need, you can delete any of them.">Deleting elements, attributes, entities, notations, and comments</a><br />
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(C) Copyright IBM Corporation 2000, 2005. All Rights Reserved.
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