|`[CONTAINER]`| Name of the CSV file containing heart rate data that is compressed inside an Empatica zip file. Since these zip files are created [automatically](https://support.empatica.com/hc/en-us/articles/201608896-Data-export-and-formatting-from-E4-connect-) by Empatica, there is no need to change the value of this attribute.
|maxhr |beats |The maximum heart rate during a time segment.
|minhr |beats |The minimum heart rate during a time segment.
|avghr |beats |The average heart rate during a time segment.
|medianhr |beats |The median of heart rate during a time segment.
|modehr |beats |The mode of heart rate during a time segment.
|stdhr |beats |The standard deviation of heart rate during a time segment.
|diffmaxmodehr |beats |The difference between the maximum and mode heart rate during a time segment.
|diffminmodehr |beats |The difference between the mode and minimum heart rate during a time segment.
|entropyhr |nats |Shannon’s entropy measurement based on heart rate during a time segment.
!!! note "Assumptions/Observations"
We extract the previous features based on the average heart rate values computed in [10-second windows](https://support.empatica.com/hc/en-us/articles/360029469772-E4-data-HR-csv-explanation).