BI7 and BI30
In hierarchy de.* the Breidbart index is used with a time range of seven days instead of 45. This is denoted by the abbreviation BI7.
In hierarchy hamster.de.* the Breidbart index is used with a time range of 30 days instead of 45. This is denoted by the abbreviation BI30.
Read more about this topic: Breidbart Index