# Change History

Released On | Description
--- | ---
2021-10-30 | Modified the following content: Optimized the descriptions for some APIs.
2019-04-25 | Modified the following content: Added response parameters in Querying API Versions (Native OpenStack API) and Querying an API Version (Native OpenStack API).

2019-01-30

Modified the following content:

- Added descriptions in Querying API Versions (Native OpenStack API) and Querying an API Version (Native OpenStack API) because microversion header "OpenStack-API-Version" is supported in microversion 2.27 and later.
- Added the OpenStack Queens version and modified Querying Details About a BMS (Native OpenStack API), Querying Details About BMSs (Native OpenStack API), and Querying SSH Key Pairs (Native OpenStack API).

2018-10-15 | Added the following content: API Version Query
2018-05-30 | Modified the following content: Adjusted the outline.

2018-03-30

Modified the following content:

- Modified the description of parameter key_name in section Creating a BMS (Native OpenStack API).
- Changed the type of parameter os-start in section Starting a BMS (Native OpenStack API).
- Added detailed description of parameter tags in section Adding Tags to a BMS (Native OpenStack API).

2018-02-07 | Accepted in OTC 3.0.
2017-11-30 | Modified the following content: Changed availability_zone to a mandatory field in section Creating a BMS (Native OpenStack API).

2017-08-30

Modified the following content:

- Deleted the constraints of configuration item allow_duplicate_networks in section Creating a BMS (Native OpenStack API).
- Changed "Network" to "IP Address" in the title of section BMS IP Address Query.
- Optimized constraint description in section Detaching an EVS Disk from a BMS (Native OpenStack API).

2017-05-30 | This issue is the first official release.