title: How to delete all invalid xml characters?
body: <p>I have a clob file with data stored in svg format. Then I have a tool that generates pdf file from this svg. When 
  I generate pdf I get an error: </p>
  
  <blockquote>
    <p>"An invalid XML character (Unicode: 0x12) was found in the element content of the document". </p>
  </blockquote>
  
  <p>I tried to replace all conrol and other characters using </p>
  
  <pre><code>regexp_replace(text, '( *[[:cntrl:]])', '');
  regexp_replace(text, '( *[[:punct:]])', ''); 
  </code></pre>
  
  <p>but i still have this error. What can I do to solve this problem using pl/sql?</p>