Review the following information to learn how System Data Exchanges (SDXs) are generated.
SDX generation from Data Flow Lines drawn between parent and child diagrams
For SDX generation, a Data Flow line input into a System Function on a parent diagram and the input Data Flow line on a child diagram to the System Function are considered as the same line if they are of the same name. For example, in the figure below, Data_Flow_41 on the parent diagram is the same as Data_Flow_41 on the child diagram, therefore the System Functions (System_Function_42 and System_Function_45) are related.
SDX generation from lines that have been split
Data Flow lines that have been split or joined are included when SDX's are generated. For example, in Figure 3 and Figure 4, the combined Data Flow line starts on the parent diagram as Data_Flow_3 output from system function X (SF1.1 X) and then splits to Data_Flow_4, which is input into System Function y, which is decomposed in a child diagram, and System Function z. From this, and examination of the child diagram, the following is true:
▪Data_Flow_4 is input into System Function y. Therefore System Function X is related to System Function y.
▪Data_Flow_5 is input into System Function z. Therefore System Function X is related to System Function Z.
▪Data_Flow_4 is picked up on the child diagram (Figure 4) as input Data_Flow_4 and then split to become Data_Flow_7 input into System_Function_8. Therefore System Function X is related to System_Function_8.
▪Data_Flow_4 is picked up on the child diagram (Figure 4) as input Data_Flow_4 and then split to become Data_Flow_10, and then split again to become Data_Flow_6 input into System_Function_10. Therefore System Function X is related to System_Function_10.
▪Data_Flow_4 is picked up on the child diagram (Figure 4) as input Data_Flow_4 and then split to become System_Function_10, and then split again to become Data_Flow_5, which is split to become Data_Flow_9 and input into System_Function_11. Therefore System Function X is related to System_Function_11. In essence, the combined, split path of Data_Flow_3+Data_Flow_4+Data_Flow_10+Data_Flow_5+Data_Flow_9 combine to form one Data Flow line.
