an input variable, which has this document type as the data type. The input variable is described below.
Since the routing process is created for a particular document type and can be started on the document page, you have to connect the process and the document type when modeling. To do so, create a variable in the process context, and select the document type as its data type:
open the Context tab of the process and create a variable with the document type as its data type. If you need to use the routing process for several document types, configure the object model to inherit document type, so that if the document type has child types, the routing process will be available to all of them.
make it an input variable, by checking the Input box on the Context tab (fig. 1);