title: Group tags in Wordpress?
body: <p>I'm building a website in Wordpress and am running into a slight problem. My website uses a somewhat complex tagging system in that there are multiple types of tags, such as CLIENTS, COLOR, THEME, and EXTRAS.</p>
  
  <p>By default, all tags live within the same group. Is there any way to organize tags into groups that can later be called by Wordpress? Similar to how the categories work?</p>
  
  <p>Edit: Perhaps there is a way to accomplish this using custom fields? My concern is that custom fields do not work in the same way tags do, in that you can't browse posts that share the same value.</p>