# Change History

Released On | Description
--- | ---
2019-05-27 | Removed the following APIs: APIs for querying stack environment and stack files and canceling stack creations or updates without a rollback
2019-05-10 | Modified the following content: Supplemented response parameters in Querying Details of a Stack and Querying Details of a Stack Resource.

2019-01-08

Added the following APIs:

- API for querying stack environment
- API for querying stack files
- API for canceling stack creations or updates without a rollback

2018-08-30 | Modified the document structure.
2018-03-30 | Optimized the document content.
2018-01-30 | Modified the following content: Descriptions in API Version Management, Stack Management, Stack Resource Management, and Stack Action Management
2017-12-30 | This issue is the first official release.