/*
   * WS-Create
   *
   * create: Create a resource
   *
   * call-seq:
   *   client.create(options, uri, xml, xml.size, "utf-8") -> XmlDoc
   *
   */
  WsXmlDocH create( client_opt_t *options, const char *resource_uri, const char *data, size_t size, const char *encoding = "utf-8") {