Normally this field will contain a business definition of the column. Such a definition may be a description of the column from a business user's point of view. This field might additionally contain information on where and how the column was acquired. For example if the column is sourced from multiple tables or is a composite or derived column then this definition would normally describe the process used to populate the column. This field is used in the documentation and is available via the view ws_admin_v_dim_col . This field is also stored as a comment against the column in the database.