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+= nng_http_req_set_version(3http)
+//
+// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+== NAME
+
+nng_http_req_set_version - set HTTP request protocol version
+
+== SYNOPSIS
+
+[source, c]
+-----------
+#include <nng/nng.h>
+#include <nng/supplemental/http/http.h>
+
+int nng_http_req_set_version(nng_http_req *req, const char *version);
+-----------
+
+== DESCRIPTION
+
+The `nng_http_req_set_version()` sets the HTTP protocol version associated with
+the request _req_ to _version_.
+The _version_ must be a string containing
+a valid HTTP protocol version, such as "HTTP/1.0".
+The default value is "HTTP/1.1".
+
+A local copy of the _version_ is made in the request _req_.
+
+NOTE: No validation of the version supplied is performed.
+
+NOTE: The library does not contain support for versions of HTTP other than
+"HTTP/1.0" and "HTTP/1.1".
+Specifying any other version may result in unspecified behavior.
+
+
+== RETURN VALUES
+
+This function returns 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+`NNG_ENOMEM`:: Insufficient memory to perform the operation.
+`NNG_ENOTSUP`:: No support for HTTP in the library.
+
+== SEE ALSO
+
+<<nng_http_req_alloc.3http#,nng_http_req_alloc(3http)>>,
+<<nng_http_req_get_version.3http#,nng_http_req_get_version(3http)>>,
+<<nng.7#,nng(7)>>