Alibaba Cloud OpenAPI uses version numbers to control the API list for major cloud service releases. For example, ApsaraDB RDS supports API version 2014-08-15. The string 2014-08-15 is a version identifier, not a date. This means the API data is always current for that version, not static since the date in the identifier.
Viewing API versions
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Log in to Alibaba Cloud OpenAPI Explorer.
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Select a cloud service.
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On the cloud service page, find the API version on the API Overview page. For example, OCR.
On the API Overview page, use the API Version drop-down list at the top to view and switch between versions. For example, OCR provides two versions: 2021-07-07 (Recommended) and 2021-03-15 (Not Recommended).