A mapping is ultimately about transforming data from one format or structure into another. In a very basic mapping scenario, you add to the mapping area the components which represent your source and your target data (for example, a source XML schema and a destination one), and then draw visually the mapping connections between the two structure. A connection is, therefore, the visual representation of how data is mapped from a source to a destination.
Components have inputs and outputs which appear on the mapping as small triangles, called connectors. Input connectors are positioned to the left of any item to which you can draw a connection. Output connectors are positioned to the right of any item from which you can draw a connection.
To draw a connection between two items:
|•||Click the output connector of a source item and drag it to a destination item. When the drop action is allowed, a link tooltip appears next to the text cursor.|
An input connector accepts only one incoming connection. If you try to add a second connection to the same input, a message box appears asking if you want to replace the connection with a new one or duplicate the input item. An output connector can have several connections, each to a different input.
To move a connection to a different item:
|•||Click the stub of the connection (the straight section closer to the target) and drag it to the destination.|
To copy a connection to a different item:
|•||Click the stub of the connection (the straight section closer to the target), and drag it to the destination while holding down the Ctrl key.|
To view the item(s) at the other end of a connection:
|•||Point to the straight section of a connection (close to the input/output connector). A tooltip appears which displays the name(s) of the item(s) at the other end of the connection. If multiple connections have been defined from the same output, then a maximum of ten item names are displayed. In the sample below, the two target items are SinglePrice and value2 of the multiply function.|
To change the connection settings, do one of the following:
|•||On the Connection menu, click Properties (this menu item becomes enabled when you select a connection).|
|•||Double-click the connection.|
|•||Right-click the connection, and then click Properties.|
See also Connection Settings.
To delete a connection, do one of the following:
|•||Click the connection, and then press the Delete key.|
|•||Right-click the connection, and then click Delete.|
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