Handling Web Cache Validation with ETags

ETags may be used to reduce bandwidth usage by preventing the contents of an unmodified resource from being returned. An Ed-Fi REST API should support such cache validation through the use of the If-None-Match request header. If the ETag value supplied in the request header still matches the existing resource, the API may respond with a 304 (Not Modified) status code with no response body, rather than a 200 (OK) with the resource content.a