IPM_TREE_ITEM is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "IPM: Represents an item in the tree" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_IPM_TREE_ITEM TYPE IPM_TREE_ITEM.
The IPM_TREE_ITEM table consists of various fields, each holding specific information or linking keys about IPM: Represents an item in the tree data available in SAP. These include NODE_KEY (Tree Control: Node Key), RELATKEY (Tree Control: Node Key), RELATSHIP (Natural Number), HIDDEN (Flag (X or Blank))... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .