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Grouping of create and remove operations in delta report is fairly straightforward because the two do not lead to complex scenarios. If a data node is added all its child nodes are also added, same applies in case of remove operation where if a parent node is removed all its child nodes are also removed. Similarly, operations on parent-child nodes like create+update, create+remove, remove+update and remove+createare not possible because if a parent is added or removed the child cannot be added, removed or updated. Hence, the grouping of data nodes which are either added or removed is simpler.
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