In the future, new features will be occasionally released for OpenSearch or the existing features will be updated or optimized for OpenSearch to meet the requirements of update and iteration. This can help meet different requirements for features and performance.
The system fields such as searchtime and viewtotal are added in the search results based on the requirements of update and iteration.
When you parse query results, do not rely on the number of fields that are returned in the search results. You need to parse only the required fields.