Table of Contents

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  1. Preface
  2. Introduction to Data Transformation
  3. Data Processor Transformation
  4. Wizard Input and Output Formats
  5. Relational Input and Output
  6. XMap
  7. Libraries
  8. Schema Object
  9. Command Line Interface
  10. Scripts
  11. Parsers
  12. Script Ports
  13. Document Processors
  14. Formats
  15. Data Holders
  16. Anchors
  17. Transformers
  18. Actions
  19. Serializers
  20. Mappers
  21. Locators, Keys, and Indexing
  22. Streamers
  23. Validators, Notifications, and Failure Handling
  24. Validation Rules
  25. Custom Script Components

Data Transformation User Guide

Data Transformation User Guide

Enforced Uniqueness of a Key

Enforced Uniqueness of a Key

The Script enforces the uniqueness of a
Key
. This has the following consequences:
  • If two or more sibling occurrences of an input element have the same key values, the Script considers each occurrence to overwrite the previous occurrences. It uses only the last occurrence that it encounters.
  • If an occurrence of an input element is missing a key value, the occurrence is ignored.
  • If the Script outputs a keyed element, and a sibling element having the same key value already exists, the existing occurrence is overwritten.
In these cases, the Script writes a warning in the event log.