||OpenSearch API V3 is released. OpenSearch API V3 optimizes OpenSearch API V2 to enhance query performance, and provides RESTful API operations that are easier to use.
||We recommend that you use OpenSearch API V3.
||OpenSearch API V2 is released. OpenSearch API V2 optimizes OpenSearch API V1 to enhance query performance.
||Stable. We recommend that you update to OpenSearch API V3.
||OpenSearch API V1 is released. OpenSearch API V1 provides API operations that are compatible with mainstream operating systems.
||Obsolete. Update to OpenSearch API V2 at your earliest opportunity.