Field help (MAT9DATEXM) 

Use this table for archiving purposes: enter the data relating to a given qualification/degree in the Detail section. Then, when you select the Add check box, the date of the qualification/degree is automatically populated in the table.
You can therefore add as many qualifications/degrees as necessary.
When you click one of the dates in the table, the data relating to a specific qualification/degree is displayed in the Detail section.