# Delta file types in the Release File Spec

**URL:** <https://forums.snomed.org/t/delta-file-types-in-the-release-file-spec/360>\
**Category:** Terminology Release AG\
**Created:** [September 22, 2025, 6:39pm UTC](https://forums.snomed.org/t/delta-file-types-in-the-release-file-spec/360 "2025-09-22T18:39:43Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![aatkinson](https://avatars.discourse-cdn.com/v4/letter/a/5daacb/32.png) [@aatkinson](https://forums.snomed.org/u/aatkinson)\
**Post date:** [September 22, 2025, 6:39pm UTC](https://forums.snomed.org/t/delta-file-types-in-the-release-file-spec/360/1 "2025-09-22T18:39:43Z")

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Question: Do we need to update the release file specification to reflect the new practice of not including the delta release file type in the International Edition release package?

- As we know, the delta format is still “valid”, but it is no longer provided as part of the International release package.

- Also we now provide a tool to generate delta files.

- We’ve updated the Delta file specifications ([3.2 Release Types](https://docs.snomed.org/snomed-ct-specifications/snomed-ct-release-file-specification/release-types-packages-and-files/3.2-release-types)) to specifically mention the removal of Delta files from the International Edition:

- ALSO the RELEASE PACKAGE CONTENTS page is definitely out of date:

- 
- **If we need to do this, let’s walk through it in the Release File Spec docs…**

- _**[Andrew Atkinson](https://conf.spaces.snomed.org/wiki/people/557058:3e65dd1a-d9df-4531-8469-08aabc67da9f?ref=confluence) to implement changes in the Documentation:**_