The default concept is the default set of properties assigned to objects, mainly used for formatting. For example, the mask for all currencies could be set to $#,##0.00;($#,##0.00) by default. Every model contains a default concept called Base. This concept is applied as the parent concept to all physical columns created under a connection. The default concept includes metadata properties that are commonly defined and sets a base line set of metadata for all physical columns in the metadata model. The purpose of the default concept is to provide legitimate values for common metadata properties that may not be set in other places in your hierarchy. You can update, add, and delete metadata properties on the default concept. You can also remove the default concept as the parent concept for any and all physical columns. You cannot, however, delete the default concept from the list of concepts in the Concept Editor.