Additional attribute for include tag?

Hello,

is there any thought on intruducing the 'labels' attribute for the <include> tag?
I think this would be very handy, because when using Liquibase on several databases that all have the same core data model but some specific differences as well, not each specific would need to be labeled, but they could all be put into an own changeLog. This changeLog could then be included with an <include> that is labeled.

Thanks,

Ben