I’m amazed how swiftly I can create resource templates (loving the RDF-triple thing!).
However, in some cases I’d like to focus the choices for related “data type = item” to a specific resource template.
For example, I have “has related agent of item” - which I limit to “Data types = Item”, but I /know/ I prefer Items of class “Agent”.
Instead I am using AdvanceResourceTemplate to fake it by setting “Filter linked resources with a query” to only show the required Class in the item search sidebar that pops up.