title: Infopath last name validation pattern single quote
body: <p>I'm trying to create a validation matching pattern in InfoPath for a last name that will not allow characters that are outside the set of A-Z or a-z. The issue is I can't seem to include common other characters in the last name like a single quote. The pattern below is the closest I can get. It allows a space and a dash but I can't figure out how to allow a single quote (ex. O'Brien). Any ideas?</p>
  
  <pre><code>[a-zA-Z]([ ]*-*[a-zA-Z])*
  </code></pre>