This attribute specifies the numerical internal value of the data value.

This value is used to determine the valid branch of a condition using a token data.

Remark : the internal values of a token data data values must be different.

Example : considering the token data 'Order kind' of an 'Order' token, the data values would be 'Urgent' and 'Non Urgent'. So the internal value of the data value 'Urgent' will be '1' and the internal value of the data value 'Non Urgent' will be '2'.