During last years Hackathon in Prague, the new EntitySchema extension was announced. In this extension, using a structured language called Shape Expressions, the structure of a Wikidata item can be described. If needed/wanted I am happy to give an online tutorial on how to write a Shape Expression and how to use them to check if an item on a given topic fits the expected structure.
We will be using various tools to edit or extract schema for Wikidata.