Request:

• The format of the statement in the request body is the same as for the POST body. The ID will be ignored.
• edit metadata
• If-Match and If-Unmodified-Since headers

Responses:

• On the successful replacement of the statement content, API would respond with 200 and response body contains the statement data.
  • this will include ETag and Last-Modified headers
• Validation errors of item ID or statement ID result in a 400 response
• Changing a statement's mainsnak property is disallowed and will also result in a 400 response
• If the statement with the requested ID does not exist, API would respond with 404.
• If the subject item of the statement is a redirect, API would also respond with 404
• In case the ETag or last-modified timestamp provided is not the most recent version of the item, the API would response in 412 Precondition Failed response code.