In order to maximize the utility of the defined maturity indicators, they were mapped to an abstract set of variables in such a way that overlap between the 12 lists can be observed and quantified. For example, maturity indicators related to nanomaterial size were grouped together and that inclides: diameter, aspect ration, dimensions, and size distribution. Moreover, the abstract set of indicators were also mapped to five different applications in the nanosafety domain highlighting the minimal reporting of variables needed for each of those applications as shown in Table . The mapping between the abstract variables and the five applications was reused from a table provided in the Nano-SolveIT EU project deliverable report D1.7. Originally, the initial mapping between variables/endpoints and the five applications was based on reviews published by GRACIOUS and the ToxRTool quality measures as well as the NanoInChI concept and the ECHA guideline on QSAR information requirements and read-across .