Introduction and “How to read”
In order to get a better insight into the dynamics of contribution to the substance articles, we build this map. It shows the number of edits over time, i.e. the number of contributions to the article by Wikipedia users. A high number of edits can be due to increasing public (or specialist) interest in the substance, due to disagreements in the editor community, and due to growing available knowledge about a substance. It can also be due to maintenance work, such as formatting and adding info boxes. The normalized view of the map removes relative differences between pages with many and little edits overall, and only shows the relative edits changes. The absolute view also gives an indication which pages have more and less contributions in absolute numbers, but the changes can be less clear.