title: Test character set ISO 20022
body: <p>For a banking program in Excel, I am looking for a way to test (validate) the characters in a message.</p>
  
  <p>I use Regular Expressions for validation of an e-mail address. Now I'm looking for a similar way to test if the used characters are correct.</p>
  
  <p>According to the XML standard they should be <code>a-z A-Z 0-9 and /-?:()-,'+</code>. The numbers and digits are easy enough, but what about testing the special symbols?</p>
  
  <p>Regards,
  Ronald</p>