diff --git a/doc/configuration.txt b/doc/configuration.txt
index 18da5b982..ae76ef317 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -975,7 +975,7 @@ description <text>
   Please note that this option is only available when haproxy has been
   compiled with USE_51DEGREES.
 
-51degrees-property-name-list [<string>]
+51degrees-property-name-list [<string> ...]
   A list of 51Degrees property names to be load from the dataset. A full list
   of names is available on the 51Degrees website:
   https://51degrees.com/resources/property-dictionary
@@ -12157,6 +12157,23 @@ bool) which make it possible to report a match without having to write an ACL.
 
 The currently available list of transformation keywords include :
 
+51d.single(<prop>[,<prop>*])
+  Returns values for the properties requested as a string, where values are
+  separated by the delimiter specified with "51degrees-property-separator".
+  The device is identified using the User-Agent header passed to the
+  converter. The function can be passed up to five property names, and if a
+  property name can't be found, the value "NoData" is returned.
+
+  Example :
+    # Here the header "X-51D-DeviceTypeMobileTablet" is added to the request
+    # containg values for the three properties requested by using the
+    # User-Agent passed to the converter.
+    frontend http-in
+      bind *:8081
+      default_backend servers
+      http-request set-header X-51D-DeviceTypeMobileTablet \
+        %[req.fhdr(User-Agent),51d.single(DeviceType,IsMobile,IsTablet)]
+
 add(<value>)
   Adds <value> to the input value of type signed integer, and returns the
   result as a signed integer. <value> can be a numeric value or a variable
@@ -13557,6 +13574,23 @@ when no content is yet made available. The fetch methods described here are
 usable as low as the "tcp-request content" rule sets unless they require some
 future information. Those generally include the results of SSL negotiations.
 
+51d.all(<prop>[,<prop>*]) : string
+  Returns values for the properties requested as a string, where values are
+  separated by the delimiter specified with "51degrees-property-separator".
+  The device is identified using all the important HTTP headers from the
+  request. The function can be passed up to five property names, and if a
+  property name can't be found, the value "NoData" is returned.
+
+  Example :
+    # Here the header "X-51D-DeviceTypeMobileTablet" is added to the request
+    # containing the three properties requested using all relevant headers from
+    # the request.
+    frontend http-in
+      bind *:8081
+      default_backend servers
+      http-request set-header X-51D-DeviceTypeMobileTablet \
+        %[51d.all(DeviceType,IsMobile,IsTablet)]
+
 ssl_bc : boolean
   Returns true when the back connection was made via an SSL/TLS transport
   layer and is locally deciphered. This means the outgoing connection was made