Architecting and designing > DoDAF > DoDAF 1.5 Activity Based Methodology (ABM) > Developing system views with DoDAF ABM > System data exchange generation (ABM for DoDAF)
  
System data exchange generation (ABM for DoDAF)
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.
This graphic is described in the surrounding text.
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.
This graphic is described in the surrounding text.
See also
Developing system views with DoDAF ABM