fancyapps/fancyBox — Issue #16: This usage of the rel attribute is html5 invalid
Author: sievert
Created: 2011-11-24 09:50:54+00:00
State: open

I would prefer to use the data- attribute like data-fancybox-group="GROUPID" and for older browsers / older html versions a config in the fancybox options fancybox({useRel: true})