# Data Dictionary - Depth Charts

Please note that the data source has changed after the 2024 season. From 2025 onwards, the following variables and descriptions will apply.

field | data_type | description
--- | --- | ---
dt | character | The timestamp (ISO8601-formatted text) indicating when the data record was loaded. Can be used to assign the data set to a specific point in time during the season.
team | character | Team that depth chart belongs to
player_name | character | Full name of player
espn_id | character | ESPN Player ID
gsis_id | character | Game Stats and Info Service ID: the primary ID for play-by-play data
pos_grp_id | character | Player position group identifier
pos_grp | character | Player position group: formation of offense, defense, or special teams
pos_id | character | Player position identifier
pos_name | character | Player position name
pos_abb | character | Player position abbreviation
pos_slot | numeric | A number assigned to each position in a formation
pos_rank | numeric | Player’s rank on depth chart grouped by pos_slot