Define use of Content-Location with QUERY

draft-ietf-httpbis-safe-method-w-body.xml

@@ -200,6 +200,14 @@ q=foo&limit=10&sort=-published
       using an HTTP GET request. Various non-normative examples of successful
       QUERY responses are illustrated in <xref target="examples" />.
     </t>
+
+    <t>
+      A successful response to a QUERY request &MAY; include a Content-Location
+      header field (see <xref target="RFCHTTP" section="8.7"/>) containing an
+      identifier for a specific resource corresponding to the results of the
+      operation. A client can send a GET request for the indicated URI to repeat
+      the query in the future without resending the query parameters.
+    </t>
 
     <t>
       The semantics of the QUERY method change to a "conditional QUERY" if