A Question_Element corresponds to a list of choices, a ListBox for GUI designers or in a more programming vision an enumeration of strings.
| Name | Type | Not Null | Primary Key | Foreign Key | Remarks |
| :——— | :——— | :————- | :—————- | :—————- | :———— |
| id_flexible_element | bigint | X | X | flexible\_element(id_flexible_element) | This is the primary key of the table and also a foreign key on the table flexible_element which is its parent table. |
| is_multiple | bool | It indicates if several values can be selected or only one value. | |||
| id_category_type | integer | X | category\_type(id_category_type) | This is a foreign key to the table category_type. | |
| id_quality_criterion | integer | X | quality\_criterion(id_quality_criterion) | This is a foreign key to the table quality_criterion. It says if a question element corresponds to a question linked to a quality criterion. |