There are several ways that you can extend the BI models. Below is a discussion of each. Person Attributes You can determine which person attributes you would like to have added to the BI models. You can also determine which are marked to track history. Tracking history allows you to see the changes to attributes over time. Family Attributes Like Person attributes, you can also mark specific family attributes to track their changes. Calendars Part of what makes the BI models so fast is how they handle dates. Each day has a row in a large date table. Along with the actual date is stored the year, month, quarter, etc. This allows the data to be filtered, or sliced, very quickly. Because some of the date information centers around fiscal years, which can be different for each organization, Rock allows you to customize the calendar dimension settings. You can configure this under Admin Tools > System Settings > Calendar Dimension Settings. Keep in mind that changing Calendar Dimension Settings can be risky. For instance, changing the Start Date to a date in 2020 means nobody born before 2020 will show up in a data view looking for people by age.