Interactive vs. linear documentary

What are the differentiating characteristics between an interactive documentary and a linear one?

Interview for COME/IN/DOC

Florian Thalhofer questioned by Arnau Gifreu.

Is interactive documentary the natural evolution of linear documentary?

Do you believe that interactive documentary is the natural evolution of linear documentary?

Interview for COME/IN/DOC

Florian Thalhofer questioned by Arnau Gifreu.