The Dallas Contemporary’s executive director Peter Doroshenko has experience with art fairs — he’s curated two exhibitions at the Venice Biennial, one of the biggest visual arts to-dos in the world. With the newly expanded Dallas Art Fair happening next weekend, we ask him about the purposes of an art fair — beyond the trade-show connection of retailers meeting up with collectors. We ask him about the Contemporary’s three shows that are also opening — particularly an effort involving 10 French art students coming to Texas. And we ask him about his own efforts to create a “new model” for a 21st-century art museum.