The pattern is simple:
Wiki systems should map macros to make it easy to add some of the UI capabilities (such as adding an element to the already displayed list). Usual wiki renders everything in a page from scratch. In this model, you request only incremental info (using versions), and integrate that with what is displayed on UI.
But that would mean that all elements of wiki topic need to be accessed using structured approach. And perhaps we require fine-grain addressing of individual data items within the topic.