This document contains a high-level discussion of the use cases depicts statements should cover in the SDC implementation.
PDF version: https://commons.wikimedia.org/wiki/File:Structured_Data_on_Commons_-_%E2%80%9CDepicts%E2%80%9D_CC_spec.pdf
Google Docs version: https://docs.google.com/presentation/d/1VLkf0dREFjaddZMo9YtZA34OR7YI4qf_JCPiJURuRh0/edit#slide=id.g38bed238be_0_0