http://www.vizrt.com/types/relation/merge
This link relation identifies a link that can be used to merge two or more tags. Links of this type occur in resources representing tags.
The following example shows a link of this type:
<entry> ... <link rel="http://www.vizrt.com/types/relation/merge" href="http://host-ip-address/webservice/escenic/classification/merge> ... </entry>