WPSTLHDIROW 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 "WPS: Task List Hierarchy - Structure for Direct Input" 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_WPSTLHDIROW TYPE WPSTLHDIROW.
The WPSTLHDIROW table consists of various fields, each holding specific information or linking keys about WPS: Task List Hierarchy - Structure for Direct Input data available in SAP. These include PARENT_PLNNR (Key for Task List Group), PARENT_PLNAL (Group Counter), PARENT_TL_EXTID (A&D: External ID of Task List), CHILD_PLNTY (Task List Type)... 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. .