title: RESTful Web Service usage of custom link relations - 'rel'
body: <p>I'm working on a RESTful service and have been focusing on Discoverability, Link relations - 'rel' and microformats. I'm not clear about the values of 'rel' in the context of REST - am I allowed to make use of any custom value, to provide richer semantics or should I only use the default values (which are very constraining)? </p>
  
  <p>I am aware that microformats have indeed extended the values of 'rel', but I am not using any kind of microformat yet. </p>
  
  <p>Any help is appreciated. 
  Thanks. </p>