$ curl -i -XHEAD http://schema.org/breadcrumb
HTTP/1.1 405 Method Not Allowed
Allow: GET
Content-Type: text/html; charset=UTF-8
Content-Length: 188
Date: Thu, 10 Mar 2016 08:52:25 GMT
Server: Google Frontend
Accordingly to RFC 2616 section 9.4:
The metainformation contained in the HTTP headers in response to a HEAD request SHOULD be identical to the information sent in response to a GET request.
Accordingly to RFC 2616 section 9.4: