title: rel="tooltip", is it bad practice?
body: <p>In the bootstrap documentation for tooltips, it uses <code>&lt;a href="#" rel="tooltip" title="first tooltip"&gt;hover over me&lt;/a&gt;</code>. Tooltips are just cosmetic though. Not css style but just a bit of JS to change how a title attribute is presented.</p>
  
  <p>The "rel" attribute is meant to be used to tell a bot (such as google) about the nature of a link. The options are alternate, author, bookmark, help, license, next, nofollow, noreferrer, prefetch, prev, search, and tag.</p>
  
  <p>Is it not bad practice to use <code>rel = "tooltip"</code> since tooltip is cosmetic, says nothing about the nature of the link, and isn't otherwise bot or browser interpret-able?</p>