Getting Started with InfoSphere Data Architect

Chapter 8 – Model Mapping and Discovery 147
The mapping editor has three panes, as shown in Figure 8.2:
• Source: This pane contains the source file and schema.
• Mappings: This pane will display mappings and mapping groups within the mapping model.
• Target: This pane contains the target file and schema.
Figure 8.2 – Getting to know the mapping editor
8.2.2 Adding mappings to mapping model
You can create mappings between the source and target schemas from the mapping editor. You can
create mappings in two ways:
• Manually add mappings: Select objects in the Source and Target panes, then create a mapping
between them.
• Let the workbench discover mappings: Run the Discover Relationships wizard to determine
the best mappings between data objects.
8.2.2.1 Manually creating a mapping
When you create a mapping manually, you ensure that each source object is mapped to its appropriate,
corresponding object in the target data model. This can be a time-consuming process, but in the case of
small data models, it is sometimes best to use this method.
Let's experiment with manually creating mappings and create two mappings:
1. Map the STUDENT.STUDENT_ID columns:
a. Left-click to select the STUDENT.STUDENT_ID column in the Source pane.
b. Left-click to select the STUDENT.STUDENT_ID column in the Target pane. The selected
columns are shown in the image in Figure 8.3.