diff --git a/btrbk b/btrbk
index 71e6a65..51edb45 100755
--- a/btrbk
+++ b/btrbk
@@ -77,29 +77,29 @@ my %config_options = (
   # NOTE: the parser always maps "no" to undef
   # NOTE: keys "volume", "subvolume" and "target" are hardcoded
   # NOTE: files "." and "no" map to <undef>
-  timestamp_format            => { default => "short",   accept => [ "short", "long", "long-iso" ], context => [ "root", "volume", "subvolume" ] },
-  snapshot_dir                => { default => undef,     accept_file => { relative => 1 }, context => [ "root", "volume", "subvolume" ] },
+  timestamp_format            => { default => "short",   accept => [ "short", "long", "long-iso" ], context => [ "global", "volume", "subvolume" ] },
+  snapshot_dir                => { default => undef,     accept_file => { relative => 1 }, context => [ "global", "volume", "subvolume" ] },
   snapshot_name               => { c_default => 1,       accept_file => { name_only => 1 }, context => [ "subvolume" ], deny_glob_context => 1 },   # NOTE: defaults to the subvolume name (hardcoded)
-  snapshot_create             => { default => "always",  accept => [ "no", "always", "ondemand", "onchange" ], context => [ "root", "volume", "subvolume" ] },
+  snapshot_create             => { default => "always",  accept => [ "no", "always", "ondemand", "onchange" ], context => [ "global", "volume", "subvolume" ] },
   incremental                 => { default => "yes",     accept => [ "yes", "no", "strict" ] },
   incremental_clones          => { default => 0,         accept_numeric => 1 },
   incremental_resolve         => { default => "mountpoint", accept => [ "mountpoint", "directory", "_all_accessible" ] },
   preserve_day_of_week        => { default => "sunday",  accept => [ (keys %day_of_week_map) ] },
   preserve_hour_of_day        => { default => 0,         accept => [ (0..23) ]  },
-  snapshot_preserve           => { default => undef,     accept => [ "no" ], accept_preserve_matrix => 1, context => [ "root", "volume", "subvolume" ], },
-  snapshot_preserve_min       => { default => "all",     accept => [ "all", "latest" ], accept_regexp => qr/^[1-9][0-9]*[hdwmy]$/, context => [ "root", "volume", "subvolume" ], },
+  snapshot_preserve           => { default => undef,     accept => [ "no" ], accept_preserve_matrix => 1, context => [ "global", "volume", "subvolume" ], },
+  snapshot_preserve_min       => { default => "all",     accept => [ "all", "latest" ], accept_regexp => qr/^[1-9][0-9]*[hdwmy]$/, context => [ "global", "volume", "subvolume" ], },
   target_preserve             => { default => undef,     accept => [ "no" ], accept_preserve_matrix => 1 },
   target_preserve_min         => { default => "all",     accept => [ "all", "latest", "no" ], accept_regexp => qr/^[0-9]+[hdwmy]$/ },
-  archive_preserve            => { default => undef,     accept => [ "no" ], accept_preserve_matrix => 1, context => [ "root" ] },
-  archive_preserve_min        => { default => "all",     accept => [ "all", "latest", "no" ], accept_regexp => qr/^[0-9]+[hdwmy]$/, context => [ "root" ] },
+  archive_preserve            => { default => undef,     accept => [ "no" ], accept_preserve_matrix => 1, context => [ "global" ] },
+  archive_preserve_min        => { default => "all",     accept => [ "all", "latest", "no" ], accept_regexp => qr/^[0-9]+[hdwmy]$/, context => [ "global" ] },
   btrfs_commit_delete         => { default => undef,     accept => [ "after", "each", "no" ] },
   ssh_identity                => { default => undef,     accept_file => { absolute => 1 } },
   ssh_user                    => { default => "root",    accept_regexp => qr/^[a-z_][a-z0-9_-]*$/ },
   ssh_compression             => { default => undef,     accept => [ "yes", "no" ] },
   ssh_cipher_spec             => { default => "default", accept_regexp => qr/^$ssh_cipher_match(,$ssh_cipher_match)*$/ },
-  transaction_log             => { default => undef,     accept => [ "no" ], accept_file => { absolute => 1 }, context => [ "root" ] },
-  transaction_syslog          => { default => undef,     accept => [ "no", @syslog_facilities ], context => [ "root" ] },
-  lockfile                    => { default => undef,     accept => [ "no" ], accept_file => { absolute => 1 }, context => [ "root" ] },
+  transaction_log             => { default => undef,     accept => [ "no" ], accept_file => { absolute => 1 }, context => [ "global" ] },
+  transaction_syslog          => { default => undef,     accept => [ "no", @syslog_facilities ], context => [ "global" ] },
+  lockfile                    => { default => undef,     accept => [ "no" ], accept_file => { absolute => 1 }, context => [ "global" ] },
 
   rate_limit                  => { default => undef,     accept => [ "no" ], accept_regexp => qr/^[0-9]+[kmgtKMGT]?$/, require_bin => 'mbuffer' },
   rate_limit_remote           => { default => undef,     accept => [ "no" ], accept_regexp => qr/^[0-9]+[kmgtKMGT]?$/ },  # NOTE: requires 'mbuffer' command on remote hosts
@@ -132,11 +132,11 @@ my %config_options = (
   backend_local               => { default => undef,         accept => [ "no", "btrfs-progs", "btrfs-progs-btrbk", "btrfs-progs-sudo" ] },
   backend_remote              => { default => undef,         accept => [ "no", "btrfs-progs", "btrfs-progs-btrbk", "btrfs-progs-sudo" ] },
 
-  snapshot_qgroup_destroy     => { default => undef,     accept => [ "yes", "no" ], context => [ "root", "volume", "subvolume" ] },
+  snapshot_qgroup_destroy     => { default => undef,     accept => [ "yes", "no" ], context => [ "global", "volume", "subvolume" ] },
   target_qgroup_destroy       => { default => undef,     accept => [ "yes", "no" ] },
-  archive_qgroup_destroy      => { default => undef,     accept => [ "yes", "no" ], context => [ "root" ] },
+  archive_qgroup_destroy      => { default => undef,     accept => [ "yes", "no" ], context => [ "global" ] },
 
-  archive_exclude             => { default => undef,     accept_file => { wildcards => 1 }, allow_multiple => 1, context => [ "root" ] },
+  archive_exclude             => { default => undef,     accept_file => { wildcards => 1 }, allow_multiple => 1, context => [ "global" ] },
   archive_exclude_older       => { default => undef,     accept => [ "yes", "no" ] },
 
   # deprecated options
@@ -144,11 +144,11 @@ my %config_options = (
                                    deprecated => { DEFAULT => { warn => 'Please use "ssh://hostname[:port]" notation in the "volume" and "target" configuration lines.' } } },
   btrfs_progs_compat          => { default => undef, accept => [ "yes", "no" ],
                                    deprecated => { DEFAULT => { ABORT => 1, warn => 'This feature has been dropped in btrbk-v0.23.0. Please update to newest btrfs-progs, AT LEAST >= $BTRFS_PROGS_MIN' } } },
-  snapshot_preserve_daily     => { default => 'all', accept => [ "all" ], accept_numeric => 1, context => [ "root", "volume", "subvolume" ],
+  snapshot_preserve_daily     => { default => 'all', accept => [ "all" ], accept_numeric => 1, context => [ "global", "volume", "subvolume" ],
                                    deprecated => { DEFAULT => { FAILSAFE_PRESERVE => 1, warn => 'Please use "snapshot_preserve" and/or "snapshot_preserve_min"' } } },
-  snapshot_preserve_weekly    => { default => 0, accept => [ "all" ], accept_numeric => 1, context => [ "root", "volume", "subvolume" ],
+  snapshot_preserve_weekly    => { default => 0, accept => [ "all" ], accept_numeric => 1, context => [ "global", "volume", "subvolume" ],
                                    deprecated => { DEFAULT => { FAILSAFE_PRESERVE => 1, warn => 'Please use "snapshot_preserve" and/or "snapshot_preserve_min"' } } },
-  snapshot_preserve_monthly   => { default => 'all', accept => [ "all" ], accept_numeric => 1, context => [ "root", "volume", "subvolume" ],
+  snapshot_preserve_monthly   => { default => 'all', accept => [ "all" ], accept_numeric => 1, context => [ "global", "volume", "subvolume" ],
                                    deprecated => { DEFAULT => { FAILSAFE_PRESERVE => 1, warn => 'Please use "snapshot_preserve" and/or "snapshot_preserve_min"' } } },
   target_preserve_daily       => { default => 'all', accept => [ "all" ], accept_numeric => 1,
                                    deprecated => { DEFAULT => { FAILSAFE_PRESERVE => 1, warn => 'Please use "target_preserve" and/or "target_preserve_min"' } } },
@@ -3707,7 +3707,7 @@ sub append_config_option($$$$;@)
   }
 
   if($opt->{context} && !grep(/^$context$/, @{$opt->{context}}) && ($context ne "OVERRIDE")) {
-    ERROR "Option \"$key\" is only allowed in " . join(" or ", map("\"$_\"", @{$opt->{context}})) . " context $error_statement";
+    ERROR "Option \"$key\" is only allowed in " . join(" or ", @{$opt->{context}}) . " context $error_statement";
     return undef;
   }
 
@@ -3848,8 +3848,8 @@ sub parse_config_line($$$$$)
     # be very strict about file options, for security sake
     my ($url_prefix, $path) = check_url($value, error_statement => "for option \"$key\" in \"$file\" line $.");
     return undef unless(defined($path));
-    TRACE "config: adding volume \"$url_prefix$path\" to root context";
-    die unless($cur->{CONTEXT} eq "root");
+    TRACE "config: adding volume \"$url_prefix$path\" to global context";
+    die unless($cur->{CONTEXT} eq "global");
     my $volume = { CONTEXT    => "volume",
                    PARENT     => $cur,
                    SUBSECTION => [],
@@ -3861,7 +3861,7 @@ sub parse_config_line($$$$$)
   elsif($key eq "subvolume")
   {
     while($cur->{CONTEXT} ne "volume") {
-      if(($cur->{CONTEXT} eq "root") || (not $cur->{PARENT})) {
+      if(($cur->{CONTEXT} eq "global") || (not $cur->{PARENT})) {
         ERROR "Subvolume keyword outside volume context, in \"$file\" line $.";
         return undef;
       }
@@ -3992,7 +3992,7 @@ sub init_config(@)
     next if $config_options{$_}->{deprecated};  # don't pollute hash with deprecated options
     $defaults{$_} = $config_options{$_}->{default};
   }
-  return { CONTEXT => "root", SUBSECTION => [], PARENT => \%defaults };
+  return { CONTEXT => "global", SUBSECTION => [], PARENT => \%defaults };
 }
 
 
@@ -5810,7 +5810,7 @@ MAIN:
   {
     # no filter_args present, abort "noauto" contexts
     if(config_key($config, "noauto")) {
-      WARN "Option \"noauto\" is set in root context, and no filter argument present, exiting";
+      WARN "Option \"noauto\" is set in global context, and no filter argument present, exiting";
       exit 0;
     }
     foreach my $sroot (vinfo_subsection($config, 'volume')) {