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Direct Mapping Reverse Mapping
Please refer to picture 6.26. Please refer to picture 6.28.
Component: Component:
   Y_EM_CONTEXT :    Y_EM_CONTEXT_RM :
      1.  get records from Database       1.  get records from Database
      2. doesn’t contain any view       2. a view to embed interface view
      3. define a node STUDENT with attribute                            3. define usage of component Y_EM_LAYOUT_RM
          Interface Node:  Yes (can access by other component)       4. define a InterfaceController_usage, mapping Student to that of  Y_EM_LAYOUT_RM.         
          Input Element:    NO (can’t Input by other comp. )       5. In WDDOINIT, append some records to  Node STUDENT.
      4. In WDDOINIT, append some records to  Node STUDENT.    Y_EM_LAYOUT_RM:
   Y_EM_LAYOUT:       1. show records  in a table
      1.  show records in a table       2. define a node STUDENT with attribute                     
      2. define usage of  component Y_EM_CONTEXT            Interface Node:  Yes (can access by other component)
      3. mapping the two STUDENT from Y_EM_CONTEXT and Y_EM_LAYOUT in tab  context.                   Input Element:    Yes ( Input by Y_EM_CONTEXT_RM)

EXTERNAL_MAPPING.gif

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