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Oracle TopLink Developer's Guide 10g Release 3 (10.1.3) B13593-01 |
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# Configuring Foreign Key Pairs

In a one-to-one EIS mapping, you relate a source object attribute to a target object attribute by specifying one or more pairs of source and target object fields.

In a one-to-one EIS mapping with key on source (see "EIS One-to-One Mappings With Key on Source") using XML records, TopLink puts the target XML field value into the source object's record as a simple value.

In a one-to-one EIS mapping with key on target (see "EIS One-to-One Mappings With Key on Target") using XML records, TopLink uses the source XML field value in the selection interaction to acquire the appropriate instance of target object.

## Using TopLink Workbench

To specify the source and target XML field pairs for a one-to-one EIS mapping, use this procedure:

1. Select the one-to-one EIS mapping in the Navigator. Its properties appear in the Editor.

2. Click the General tab. The General tab opens.

   Figure 62-1 Foreign Keys Field on General Tab

   Description of "Figure 62-1 Foreign Keys Field on General Tab"

3. Click Add in the Foreign Keys area to add a key pair. The Specify Field Pair dialog box appears.

Figure 62-2 Specify Field Pair Dialog Box

Description of "Figure 62-2 Specify Field Pair Dialog Box"

Click Browse to add a foreign key for the Source XPath and Target XPath fields.