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

Example of Indexing by Key

Example of Indexing by Key

To further introduce the data-holder identification issues, we present an example of indexing by key.
The example is a mapper that uses indexing to identify the occurrences of data holders in both its input and its output. On the input side, the indexing matches the corresponding data from different parts of an XML structure. On the output side, the indexing finds the correct location of an element in an XML structure.
The example illustrates the use of:
  • The
    source
    and
    target
    properties
  • The
    Locator
    ,
    Key
    , and
    LocatorByKey
    components
In the following sections of the chapter, we will explain the detailed operation of these properties and components.