Try it Yourself: XML DTD

XML DTD

<!DOCTYPE html>
<html>
<body>

<pre>
&lt;?xml version="1.0"?&gt;
&lt;!DOCTYPE note [
  &lt;!ELEMENT note (to, from, heading, body)&gt;
  &lt;!ELEMENT to (#PCDATA)&gt;
  &lt;!ELEMENT from (#PCDATA)&gt;
  &lt;!ELEMENT heading (#PCDATA)&gt;
  &lt;!ELEMENT body (#PCDATA)&gt;
]&gt;
&lt;note&gt;
  &lt;to&gt;Ravi&lt;/to&gt;
  &lt;from&gt;Meera&lt;/from&gt;
  &lt;heading&gt;Reminder&lt;/heading&gt;
  &lt;body&gt;Meeting moved to 3 PM.&lt;/body&gt;
&lt;/note&gt;
</pre>

</body>
</html>

<!DOCTYPE html>
<html>
<body>

<pre>
&lt;?xml version="1.0"?&gt;
&lt;!DOCTYPE note [
  &lt;!ELEMENT note (to, from, heading, body)&gt;
  &lt;!ELEMENT to (#PCDATA)&gt;
  &lt;!ELEMENT from (#PCDATA)&gt;
  &lt;!ELEMENT heading (#PCDATA)&gt;
  &lt;!ELEMENT body (#PCDATA)&gt;
]&gt;
&lt;note&gt;
  &lt;to&gt;Ravi&lt;/to&gt;
  &lt;from&gt;Meera&lt;/from&gt;
  &lt;heading&gt;Reminder&lt;/heading&gt;
  &lt;body&gt;Meeting moved to 3 PM.&lt;/body&gt;
&lt;/note&gt;
</pre>

</body>
</html>