MIPI I3C Basic v1.1.1, the first update to the specification, was released in July 2021 and includes many features from the core specification, some of which were specifically requested from industry liaisons, as well as clarifications and editorial fixes included in I3C v1.1.1. It also replaces the terms master and slave (which MIPI has deprecated) with controller and target, respectively. Here is  official download link:  Download MIPI I3C Basic℠ v1.1.1.