diff --git a/lib/json_rails_logger/constants.rb b/lib/json_rails_logger/constants.rb
index 511718c..847e9f1 100644
--- a/lib/json_rails_logger/constants.rb
+++ b/lib/json_rails_logger/constants.rb
@@ -2,4 +2,34 @@
 
 module JsonRailsLogger
   REQUEST_ID = :request_id
+  # * THE FOLLOWING ARE NOT CURRENTLY USED BUT AVAILABLE FOR FUTURE USE * #
+  # REQUEST_URI = :request_uri
+  # REQUEST_METHOD = :request_method
+  # REQUEST_PATH = :request_path
+  # SERVER_NAME = :server_name
+  # STATUS = :status
+  # DURATION = :duration
+  # USER_AGENT = :user_agent
+  # ACCEPT = :accept
+  # MESSAGE = :message
+  # EXCEPTION = :exception
+  # BACKTRACE = :backtrace
+  # CONTROLLER = :controller
+  # ACTION = :action
+  # PARAMS = :params
+  # IP = :ip
+  # AUTH = :auth
+  # HTTP_HOST = :http_host
+  # HTTP_VERSION = :http_version
+  # HTTP_REFERER = :http_referer
+  # HTTP_COOKIE = :http_cookie
+  # HTTP_ACCEPT_ENCODING = :http_accept_encoding
+  # HTTP_ACCEPT_LANGUAGE = :http_accept_language
+  # HTTP_ACCEPT_CHARSET = :http_accept_charset
+  # HTTP_CACHE_CONTROL = :http_cache_control
+  # HTTP_CONNECTION = :http_connection
+  # HTTP_UPGRADE_INSECURE_REQUESTS = :http_upgrade_insecure_requests
+  # HTTP_ORIGIN = :http_origin
+  # HTTP_DNT = :http_dnt
+  # HTTP_X_REQUEST_ID = :http_x_request_id
 end