The fourth online issue of the 2015 EXARC Journal contains 17 articles divided over two sections. 15 articles are OpenArch related and Mixed Matters. It includes one article from the special OpenArch Crafts Issue and seven from Digest Special OpenArch Issue.

With this issue we also finished publishing the special proceedings about The Dialogue with Skills in the OpenArch Project. All nine articles published from 2013/3 are made open access.

In this issue you can also find two articles on making museums and heritage sites more accessible for people with disabilities.