title: Purpose of tilde in JSON Pointer
body: <p>The <a href="https://www.rfc-editor.org/rfc/rfc6901" rel="nofollow noreferrer">JSON Pointer</a> spec states:</p>
  <blockquote>
  <p>the characters '~' (%x7E) and '/' (%x2F) have special    meanings in
  JSON Pointer</p>
  </blockquote>
  <p>It is clear what '/' is used for, but I see no indication of what purpose the tilde serves (only mention that it needs to be escaped and how).</p>