Reza Rad has a new version of Power BI Helper out:
It is a pleasure to announce the newest version of Power BI helper, version 3.0 July 2018 with the great feature of exporting model documentation. The documentation part of the insight from Power BI Helper has been always in our backlog, but haven’t had a chance to work on it. Gladly now you can export the document to an HTML file. The exported documentation at the moment, has information about all tables in the model, all measures, all columns and calculated columns in each table with possible expressions and descriptions. If you like to learn more about Power BI Helper, read this page.
Read on to see what Power BI Helper has in terms of documentation.