HTTP 400 (bad request) for logical error, not malformed request syntax

Question

The HTTP/1.1 specification (RFC 2616) has the following to say on the meaning of status code 400, Bad Request (§10.4.1):

The request could not be unde

Answer 1

HTTPbis will address the phrasing of 400 Bad Request so that it covers logical errors as well. So 400 will incorporate 422.

From https://tools.ietf.org/html/draft-ietf-httpbis-p2-semantics-18#section-7.4.1
"The server cannot or will not process the request, due to a client error (e.g., malformed syntax)"