All comments by the discussants should follow some common criteria. On the basis of the data collection, the metadata information and the detailed documentation of data collection (see ‘Best Practices: Documentation of Data Collection’), the ciscussants could touch upon the aspects of:

• Methodology of data collection: handling of empirical challenges such as sampling (in the case of interviews and surveys), validity of the provided data, reliability of sources which provided the data;
• Completeness of the data collection;
• Applicability of the data collection for the research question of the data creator;
• Applicability of the data collection for further purposes (e.g., secondary analysis: what can be done with this data collection?); and
• Possible problems regarding copyright and data dissemination.

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