title: Can I indicate a regular expression requirement for a parameter value using Swagger?
body: <p>In my REST API, one of the submitted parameter values must be a code following the regex:</p>
  
  <p><code>/[A-Z]{2}[0-9]{4}/</code></p>
  
  <p>Is there any way, besides putting it in the <code>description</code> property of the parameter, for me to indicate that the value is not valid if it does not match my regular expression?</p>
  
  <p>I was not able to find any mention of regex's in the Swagger doc, except as a way to identify Patterned Fields (which is not what I want to do).</p>