# TiDB Versioning
+ TiDB offers two release series:
  + `Long-Term Support (LTS)`
  + `Development Milestone Release (DMR)` introduced from `TiDB v6.0.0`
+ Release number formats:
  + **`LTS`**: ***`{major_release_number}`.`{minor_release_number}`.`{patch_number}`***
  + **`DMR`**: ***`{major_release_number}`.`{minor_release_number}`.`0-DMR`***
+ For examples:
  + `7.1.1`
  + `7.3.0-DMR`
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`TiDB` offers two release series:
- Long-Term Support Releases
- Development Milestone Releases (introduced in `TiDB v6.0.0`)

Long-Term Support (`LTS`) versions are released approximately every six months and introduce new features, improvements, bug fixes and security vulnerability fixes. `LTS` releases are versioned as `X.Y.Z`. Z defaults to 0. During the lifecycle of `LTS`, patch releases are made available on demand. Patch releases contain bug fixes and security vulnerability fixes, and do not introduce new features. Patch releases are versioned as `X.Y.Z`. `X.Y` is consistent with the corresponding `LTS` versioning. The patch number `Z` increments from 1.

Development Milestone Releases (`DMR`) are released approximately every two months that do not contain `LTS`. `DMR` versions introduce new features, improvements and bug fixes. `TiDB` does not provide patch releases based on `DMR`, and any related bugs are fixed in the subsequent release series. `DMRs` are versioned as `X.Y.Z`. `Z` defaults to 0. The `-DMR` suffix is appended to the version number.

It is highly recommend to use Long-Term Support (`LTS`) versions in production environments.