After passing level 1 and level 2 evaluations, our process combines the results from the various techniques of both levels in a level 3. For a level 3 evaluation, the individual results from the analytical techniques are weighted according to their significance (for the characterisation of a compound) and prediction accuracy (according to known strengths and weaknesses of a specific evaluation method). Level 3 gives the result of the evaluation as a combination of readability, consistency, and plausibility and is used for an estimation if the provided data are trustworthy and coherent, aiming in particular to evaluate if the proposed chemical structures match the recorded experimental data. An example of a level 3 evaluation was obtained in the Chemotion systems ELN and repository and is depicted in Figure . A first overview of all results is gained via the summary of all 1 st and 2 nd level results. The summary is presented in three main categories referred to as "data availability", "data evaluation" and "analysis check". Each category includes various aspects of the evaluation processes of level 1 and level 2, facilitating the review of the provided data with a different focus. The availability of data files, metadata and analysis is a prerequisite for the overall process and is implemented as mandatory information to be given during the provision of the data. Therefore, the availability of data files, metadata and analysis is implicitly included in all review categories and not listed separately. The category "data availability" summarises the availability, readability/processability as well as openness/standardisation of the provided data files. The category "data evaluation" covers the results of the consistency and plausibility checks that were done based on the data files that were provided. As these results were gained based on the chemical structure and other metadata as necessary information, this category also includes the indirect check of the most important metadata availability and its standardisation.