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@brief default API compatibility
--server.default-api-compatibility
This option can be used to determine the API compatibility of the ArangoDB server. It expects an ArangoDB version number as an integer, calculated as follows:
10000 * major + 100 * minor (example: 10400 for ArangoDB 1.4)
The value of this option will have an influence on some API return values when the HTTP client used does not send any compatibility information.
In most cases it will be sufficient to not set this option explicitly but to keep the default value. However, in case an "old" ArangoDB client is used that does not send any compatibility information and that cannot handle the responses of the current version of ArangoDB, it might be reasonable to set the option to an old version number to improve compatibility with older clients.