1 files changed, 40 insertions, 21 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index 2cea52f02b..12346c4b8e 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -11000,6 +11000,12 @@ Return a service that runs a syslog daemon according to @var{config}.
 information on the configuration file syntax.
 @end deffn
 
+@defvr {Scheme Variable} guix-service-type
+This is the type of the service that runs the build daemon,
+@command{guix-daemon} (@pxref{Invoking guix-daemon}).  Its value must be a
+@code{guix-configuration} record as described below.
+@end defvr
+
 @anchor{guix-configuration-type}
 @deftp {Data Type} guix-configuration
 This data type represents the configuration of the Guix build daemon.
@@ -11060,11 +11066,6 @@ A directory path where the @command{guix-daemon} will perform builds.
 @end table
 @end deftp
 
-@deffn {Scheme Procedure} guix-service @var{config}
-Return a service that runs the Guix build daemon according to
-@var{config}.
-@end deffn
-
 @deffn {Scheme Procedure} udev-service [#:udev @var{eudev} #:rules @code{'()}]
 Run @var{udev}, which populates the @file{/dev} directory dynamically.
 udev rules can be provided as a list of files through the @var{rules}
@@ -11545,10 +11546,11 @@ The @code{(gnu services networking)} module provides services to configure
 the network interface.
 
 @cindex DHCP, networking service
-@deffn {Scheme Procedure} dhcp-client-service [#:dhcp @var{isc-dhcp}]
-Return a service that runs @var{dhcp}, a Dynamic Host Configuration
-Protocol (DHCP) client, on all the non-loopback network interfaces.
-@end deffn
+@defvr {Scheme Variable} dhcp-client-service-type
+This is the type of services that run @var{dhcp}, a Dynamic Host Configuration
+Protocol (DHCP) client, on all the non-loopback network interfaces.  Its value
+is the DHCP client package to use, @code{isc-dhcp} by default.
+@end defvr
 
 @deffn {Scheme Procedure} dhcpd-service-type
 This type defines a service that runs a DHCP daemon.  To create a
@@ -11815,20 +11817,37 @@ objects}).
 @end table
 @end deftp
 
-@cindex NTP
+@cindex NTP (Network Time Protocol), service
 @cindex real time clock
-@deffn {Scheme Procedure} ntp-service [#:ntp @var{ntp}] @
-  [#:servers @var{%ntp-servers}] @
-  [#:allow-large-adjustment? #f]
-Return a service that runs the daemon from @var{ntp}, the
-@uref{http://www.ntp.org, Network Time Protocol package}.  The daemon will
-keep the system clock synchronized with that of @var{servers}.
-@var{allow-large-adjustment?} determines whether @command{ntpd} is allowed to
-make an initial adjustment of more than 1,000 seconds.
-@end deffn
+@defvr {Scheme Variable} ntp-service-type
+This is the type of the service running the the @uref{http://www.ntp.org,
+Network Time Protocol (NTP)} daemon, @command{ntpd}.  The daemon will keep the
+system clock synchronized with that of the specified NTP servers.
+
+The value of this service is an @code{ntpd-configuration} object, as described
+below.
+@end defvr
+
+@deftp {Data Type} ntp-configuration
+This is the data type for the NTP service configuration.
+
+@table @asis
+@item @code{servers} (default: @code{%ntp-servers})
+This is the list of servers (host names) with which @command{ntpd} will be
+synchronized.
+
+@item @code{allow-large-adjustment?} (default: @code{#f})
+This determines whether @command{ntpd} is allowed to make an initial
+adjustment of more than 1,000 seconds.
+
+@item @code{ntp} (default: @code{ntp})
+The NTP package to use.
+@end table
+@end deftp
 
 @defvr {Scheme Variable} %ntp-servers
-List of host names used as the default NTP servers.
+List of host names used as the default NTP servers.  These are servers of the
+@uref{https://www.ntppool.org/en/, NTP Pool Project}.
 @end defvr
 
 @cindex OpenNTPD
@@ -17167,7 +17186,7 @@ A helper function to quickly add php to an @code{nginx-server-configuration}.
 
 A simple services setup for nginx with php can look like this:
 @example
-(services (cons* (dhcp-client-service)
+(services (cons* (service dhcp-client-service-type)
                  (service php-fpm-service-type)
                  (service nginx-service-type
                           (nginx-server-configuration