DATA_NODES_VAR < options >;
NODES_VAR < options >;
The DATA_NODES_VAR statement enables you to explicitly define the data set variable names for PROC OPTGRAPH to use when it reads the data set that is specified in the DATA_NODES= option in the PROC OPTGRAPH statement. The format of the node input data set is defined in the section Node Input Data.
You can specify the following options in the DATA_NODES_VAR statement: