Attributes#dereferencedDataStructures minim support

[opichals]

As the <Attributes element=... and dataStructures=...> properties support minim Element as their values (since #462) the props.dereferencedDataStructures minim Element support should be implemented as well.

This would allow the minim Element using application to optimize by sharing the dereferencedDataStructures between multiple data structures and therefore consume less CPU.