http://www.vizrt.com/types/relation/preview
This relation identifies a link to a preview of a content item. Links of this type occur in entry resources representing content items.
The following example shows a link of this type:
<entry> ... < link href="http://host-ip-address/webservice/escenic/content/preview" rel="http://www.vizrt.com/types/relation/preview"/> ... </entry>