# Change History

Date | Description
--- | ---

2021-01-31

This issue incorporates the following changes:

- Added the description about how you select an endpoint when calling an API in API Usage Guidelines.
- Supported a maximum of 20 tags for a resource.
- Modified the description of example requests in the following sections:
  - Creating a PTR Record
  - Querying a PTR Record
  - Unsetting a PTR Record
  - Modifying a PTR Record

2019-01-30 | This issue incorporates the following changes: Added error messages in section Error Code.

2018-11-30

This issue incorporates the following changes:

Added the sort_key and sort_dir fields in the URI in the following sections:

- Querying All Record Sets
- Querying Record Sets in a Zone

2018-09-30 | This issue incorporates the following changes: Added Querying the DNS API Version.
2018-08-30 | This issue incorporates the following changes: Added Querying Resources by Tag. Integrated tag management for global and region-level resources in Tag Management.

2018-07-30

This issue incorporates the following changes:

- Changed the description of the name field in section Creating a Public Zone.
- Changed the description of the name field in section Creating a Private Zone.
- Changed the description of the type field in section Modifying a Private Zone.
- Separated tag management for global and region-level resources in section Tag Management.

2018-06-30 | This issue incorporates the following changes: Accepted in OTC 3.1.

2018-06-15

This issue incorporates the following changes:

Changed the tag character set range, covering the following sections:

- Creating a Public Zone
- Creating a Private Zone
- Creating a Record Set
- Creating a PTR Record
- Modifying a PTR Record
- Tag Management

2018-05-04

This issue incorporates the following changes:

Added offset in the request URL, covering the following sections:

- Querying Public Zones
- Querying Private Zones
- Querying All Record Sets
- Querying All PTR Records

2018-03-30

This issue incorporates the following changes:

Added the following content:

- Adding Resource Tags
- Deleting a Resource Tag
- Querying Tags of a Specified Resource Type

Added tag information in the request body and URL, covering the following sections:

- Added tag information in the request body and URL, covering the following sections:
  - Creating a Public Zone
  - Querying Public Zones
  - Creating a Private Zone
  - Querying Private Zones
  - Creating a Record Set
  - Querying All Record Sets
  - Creating a PTR Record
- Modified description for the tag list in section Adding or Deleting Resource Tags in Batches.

2018-02-28

This issue incorporates the following changes:

- Modified description for the tag list in section Tag Management.
- Modified the description of the router field in section Creating a Private Zone.
- Modified the description of the router field in section Associating a Private Zone with a VPC.
- Modified the description of the router field in section Disassociating a VPC from a Private Zone.

2018-01-31 | This issue incorporates the following changes: Added section Tag Management. Added tag error codes in section Error Code.
2018-01-10 | This issue incorporates the following changes: Added error codes in section Error Code.
2017-12-30 | This issue incorporates the following changes: Error Code

2017-10-30

This issue incorporates the following changes:

Added the following sections:

- Modifying a Public Zone
- Modifying a Private Zone

Modified the following sections:

- Added PTR record sets in section Creating a Private Zone.
- Added PTR record sets in section Creating a Record Set.

2017-09-30

This issue incorporates the following changes:

Added the following sections:

- Modifying a Record Set
- Modifying a PTR Record

Modified the following sections:

- Added the SRV record set in the request example in section Creating a Record Set.

2017-09-01

This issue incorporates the following changes:

Supported the multi-project function.

Modified the following sections:

- Added description on private zone resource isolation in section Private Zone Management.
- Added description on PTR record resource isolation in section PTR Record Management.
- Modified description of the type field in section Querying Public Zones.
- Modified description of the type field in section Querying Private Zones.
- Added zone_type in the URI in section Querying All Record Sets.

2017-06-16 | This issue incorporates the following changes: Changed the maximum number of resources returned on each page to 500 (value of limit in sections Querying Public Zones, Querying Private Zones, Querying All Record Sets, and Querying All PTR Records).

2017-04-28

This issue incorporates the following changes:

Supported private zones.

Added the following sections:

- Querying Name Servers in a Public Zone
- Private Zone Management

Modified the following content:

- Description of zone_type in section Creating a Public Zone
- URI format in section Querying Public Zones

2017-01-20 | This issue incorporates the following changes: PTR Record Management
2016-11-30 | This issue incorporates the following changes: Added the API to query the version number in section Version Management.
2016-09-30 | This issue is the first official release.