title: How to retrieve recording relationship on release browse request on musicbrainz
body: <p>i'm currently getting needed information from musicbrainz, using the following
  browse request, browsing a specific artists releases + recordings.
  for example: (coldplay)</p>
  
  <blockquote>
    <p><a href="http://musicbrainz.org/ws/2/release?artist=cc197bad-dc9c-440d-a5b5-d52ba2e14234&amp;fmt=json&amp;inc=recordings" rel="nofollow">http://musicbrainz.org/ws/2/release?artist=cc197bad-dc9c-440d-a5b5-d52ba2e14234&amp;fmt=json&amp;inc=recordings</a></p>
  </blockquote>
  
  <p>im interested in getting for each recording its work id.
  now i tried adding 'recording-rels' to the includes but it seems only to return relationship between release and recording.
  I also tried adding 'recording-level-rels' to includes as mentioned <a href="https://musicbrainz.org/doc/Development/XML_Web_Service/Version_2#Relationships" rel="nofollow">here</a>
  where it states that it should return recordings relationships, but when i try using it - i get the following error:</p>
  
  <blockquote>
    <p>{"error":"recording-level-rels is not a valid inc parameter for the release resource."}</p>
  </blockquote>
  
  <p>Am I using it wrongly?
  To clarify, i'm after the relationship that you get from their site, say from <a href="https://musicbrainz.org/release/8e602038-c0f2-3c2d-9068-a1a3daca493d" rel="nofollow">this page</a>, where each release has recording of that contains a link to the musicbrainz work id page.</p>
  
  <p>Any help\advice would be very appreciated,
  Thank you.</p>