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- Geo: lat/longs and their frequency in the document set
- Times: number of documents per period (day, week, etc) in the document set
- Entities: entity objects found in the document set, ranked by significance.
- Events: event objects found in the document set, ranked by frequency.
- (etc)
It should be noted that aggregations are sometimes ranked by frequency, sometimes summed by significance. This distinction will become more consistent in future versions of the tool.
Finally, note that the idea of an aggregation is valid across all three of the documents sets described above (matching, top, filtered). The IWdgetContext IWidgetContext API lets you select which of the document sets to aggregate over, as show in the diagram below.
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