technical type attribute
Attribute of a data type significant for compatibility with other data types (but not for reference types). In elementary data types with the predefined ABAP type, this attribute specifies the length of the fraction portion and how many decimal places it contains. In structured types, this attribute specifies how the type is constructed from substructures and elementary data types. In table types, this attribute specifies the table category, the row type, and the table key. In mesh types, it specifies the layout of components and their associations.