(315,060) (000,050)cardinality (000,030)(1,0)030070number (1,0)030 (005,020)(20,20)[rt] (025,020)(20,20)[lb] (025,010)(1,0)005070synonym-name (1,0)005 (105,020)(20,20)[rb] (125,020)(20,20)[lt]
The elements of a row all have the same type, and are numbered from 1 up to the cardinality of the declarer, which must be either a number or a synonym for a number. This cardinality is therefore fixed, it can not be the result of an expression other than a number.