How Do I Map from Specific Instances? (Magic xpi 4.5)
To map a multi-occurrence compound to a single-occurrence element, use the replication functionality to multiply Source compounds. Then map the Source data to the Destination compound.
Sample Schema for Input XML Document:

Sample Schema for Output XML Document:

Sample XML Document:

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Create a Data Mapper step. 
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Define an XML Source type, based on the given schema. 
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Define an XML Destination type, based on the given Destination schema. 
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In the Data Mapper screen, carry out the following: 
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Enable Instance Creation by selecting Yes from the Replication parameter's drop-down list in the Source compound’s Properties pane. 
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Verify that the compound name was changed to Addresses#1 in the Data Mapper screen. 
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From the compound node’s context menu, select Add Replication to create the required number of instances. 
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Connect the duplicated Source elements to the simple Destination element. For example: 
| Note: | The replication in the Source will give you the first and second compound. There is no filtering available which allows you to select the required compound for each replication instance. |