• Add support for writing TERR expression functions that behave as aggregation methods
• Aggregates over aggregates
• Cross table aggregations
• Make it easier to handle (similar) custom expressions in different visualisations
• Ability to refer to filters in any custom expression
• Refer to Marked items in a custom expression
• Writing own aggregation functions in R
• Custom Aggregation Methods for related tables with something similar Group By functionality in SQL
• Custom expression when performing unpivot/pivot data transformation
• Sum in a custom expression using Intersect