Array to Single Value

When the input is an array and the target output is a single value, the data mapper offers two options depending on whether you want one element from the array or a value computed across the array.

Extract single element

To pull a single value out of an array, use Extract Single Element. This option appears whenever you map an array onto a single-value output (a dimension mismatch).

Aggregate and map

To compute a single value from each element of an array (for example, sum, average, count), use Aggregate and Map. Aggregation supports primitive-type arrays mapped to a compatible primitive output. The data mapper opens a focused view and prompts for the aggregation operation.

What's next

• Array to array — Map between two arrays with iteration, joins, and nesting.
• Generic type mappings — Generate types from a sample JSON or XML payload.
• Submappings — Reuse mapping logic across multiple output fields.