When you create a hierarchical schema, you base it on either a sample file or a schema file. To improve accuracy, use a schema file instead of a sample file whenever possible.
Schema files
When you use a schema file, consider the following rules and guidelines:
•The schema can't contain recursive elements.
•Each schema file can contain a maximum of 10,000 elements. To use a schema that contains more than 10,000 elements, split it into multiple files.
•To use a schema that references other schemas, you can upload each file individually or upload them together in a ZIP file. If the ZIP file contains other files in addition to XSD files, Data Integration ignores the additional files and uses only the XSD files to generate the hierarchical schema.
•If you need to upload multiple schema files with the same name, upload them in a ZIP file. If you upload them individually, Data Integration renames the duplicate files.
Sample files
When you use a sample file, ensure that it represents the data that you expect to process, including all possible fields, all permutations of the values and data types, and values that represent the length of the data that the mapping will process.