The Bootstrap Card View control is designed to edit tabular information, representing it in cards. Data sources present this information using data fields and records. In the Card View, data fields are represented as card fields (columns) and a record is displayed as a data card.
There are two types of columns (data fields).
Data columns are used to display and edit various data (e.g., string, Boolean, DateTime, memo data).
Unbound columns are used to display custom data within the grid. These columns are not bound to fields in the data source, and data for these columns needs to be provided using expressions or a dedicated event.