This XML representation of the introduction of a new law at a given time allows a data analysis with the R statistical programming tool, the extraction of its results to a data format (JSON, cf. ECMA 2013) exploitable by the visualization framework D3. We can visualize laws in the form of a hierarchical tree proceeding from the whole body of the text – at the center of the figure – deployed into lower level structural units (Figure 3). This gives us a structural overview of any given law.