Internal System Fields - ABAP Keyword Documentation -

data syList level of the list that is currently being created (basic list: 0, details lists: greater than 0). For every interactive list event, sy-lsind is automatically increased by an increment of 1. sy-lsind can only be changed in ABAP programs for navatingSY-DATUM system variable is set with System Time zone in IMG. SY-DALTO system variable is set with the User ’ s Time Default Time of IMG or Time zone of User profile.