> For the complete documentation index, see [llms.txt](https://docs.snomed.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.snomed.org/snomed-international-documents/snomed-ct-glossary/d/data-migration.md).

# data migration

## data migration

A process that allows legacy data to be accessible in a system that uses SNOMED CT.

#### Notes

* *Data migration* allows retrieval and reuse of data that was recorded prior to the introduction of SNOMED CT. This may be accomplished through actual conversion of the data or provision of methods to access data in its original form.

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