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FieldMapping

Maps a source field to a target field in the output spec

sourceFieldstringrequired

Name of the field in the input spec

Example: account_number
targetFieldstringrequired

Name of the field in the output spec

Example: accountNo
transformationstring

Optional SpEL expression to transform the value

Example: #value.substring(0, 9)
FieldMapping
{
  "sourceField": "account_number",
  "targetField": "accountNo",
  "transformation": "#value.substring(0, 9)"
}