A layout is the place where all elements are put. A layout is formed by several layout groups formed themself by several layout constraints formed finally by several flexible elements.
| Name | Type | Not Null | Primary Key | Foreign Key | Remarks |
| :——— | :——— | :————- | :—————- | :—————- | :———— |
| id_layout | bigint | X | X | This is the primary key of the table. | |
| columns_count | integer | X | This is the number of columns of the layout. Actually in Sigmah, there are always one column displayed. Others are not visibles. | ||
| rows_count | integer | X | It corresponds to the number of rows of the layout. |