Thank you very much for your response. My idea is to cover situations where I build a query, I use some fields with conditions (as example: reputation=5) and looking to multiple sources. The problem is that not all sources have field reputation and by simply adding the sources in a macro, for example, it will give me the false fact that the source is covered by that specific scenario.  Since I am using fields that should exist in every event, if there are no values within 7 days, it means that field doesn't exist for that source. One option would be to be specific about fields I am interested rather than making a list of 700 fields where I would need only 3 but the idea was to create a list of these 700 fields for 50 sources and check for each use case if the used fields are in the list and for which source. ... View more