nbsp;&nbsp;if (<a class="el" href="classXMLString.html#7ac8e671c8b93126d67ded235174e257" title="Lexicographically compares str1 and str2 and returns a value indicating their relationship...">XMLString::compareString</a>(xmlri-&gt;getSystemId(), "http://www.myhost.com/today")) {<br>
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;MyReader* reader = new MyReader();<br>
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return new InputSource(reader);<br>
 &nbsp;&nbsp;&nbsp;&nbsp;} else {<br>
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return null;<br>
 &nbsp