@alexpavel this is a great idea! It would be useful as this situation happens often and having an extra level of the composite hierarchy is not always the most efficient/best-looking solution. As you say there are some current functionalities that would need to be revisited as basically this change would mean mixing properties from ragged hierarchies and composite hierarchies. The example you've put for retrieving the PARENT would clearly be a big debate. For me, the ideal situation would be to have the option of telling Anaplan which PARENT you are referring to, so by using an extension of the PARENT function to determine if it's the ancestor parent or the next levels' parent. The idea of making it fixed to one of them only does not seem dynamic enough. Another functionality which would need to change is the selecting the levels to show option. However, if Anaplan treats the extra children as the top level item (so as an extra "level" within the lowest level of the composite hierarchy) then this would work fine as it would allow you to choose which level to show from the lowest level of the hierarchy too.
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