Displaying As a Hierarchy
Use
Some columns in a list often contain data that in some way is hierarchically superordinate to values in other columns.
You can highlight the hierarchical structure within a list by displaying the list as a hierarchy (see Showing and Hiding Hierarchies ).
Features
The following list outlines the most important properties of a hierarchy:
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The hierarchically superordinate columns are called hierarchy columns. You can set any number of columns as hierarchy columns. All hierarchy columns are then merged into one column and displayed in the first column of the list.
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Sorting
The list is automatically sorted according to all hierarchy columns. You can change the sort direction and sort sequence (see Specifying the Sort Direction and Specifying the Sort Sequence ).
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Showing and hiding hierarchy levels
The data that is hierarchically subordinate can be hidden or shown.