diff --git a/app/src/grp/grp b/app/src/grp/grp
index 3480d83..2739b9d 100755
--- a/app/src/grp/grp
+++ b/app/src/grp/grp
@@ -27,6 +27,7 @@ my $show_command=0;
 my $action="pgP";
 my $eos="seg(EOS)";
 my $morfield='lem';
+my $tags=0;
 
 #read configuration files###########################
 my $file;
@@ -60,6 +61,9 @@ foreach $file ($systemconfigfile, $userconfigfile){
     		elsif($name eq "action"){
 			$action;
     		}
+    		elsif($name eq "tags"){
+    			$tags=$value;
+    		}
     		elsif(($name eq "help")or($name eq "h")){
 			$help=1;
     		}
@@ -77,6 +81,7 @@ GetOptions("pattern|e=s" => \$pattern,
 	   "define=s" => \$macrofile,
 	   "command" => \$show_command,
 	   "action=s" => \$action,
+	   "tags=s" => \$tags,
 	   "help|h" => \$help);
 
 if($help)
@@ -96,6 +101,7 @@ Options:
 				    g - grep
 				    P - postprocess
 				(default pgP)
+   --tags=STRING                Morphosyntactic tag format.
    --command			Print the shell command to be executed and exit.
    --help -h			Help.
 END
@@ -109,6 +115,13 @@ die("$0: macro file not found") unless
     $macrofile or
     -e "$LIB_DIR/terms.m4" and $macrofile="$LIB_DIR/terms.m4";
 
+die("$0: undefined tagset format (tags option missing)") unless
+    $tags;
+
+die("$0: $tags.tag2re program not found") unless
+    1; #JAK NAPISAC WARUNEK???
+
+
 my $uncompress = ($action =~ /u/) ? ' lzop -cd | '  : '';
 my $preproc    = ($action =~ /p/) ? ' fla  | '  : '';
 
@@ -131,7 +144,7 @@ chomp $grepre;
 
 # <> expansion
 
-$grepre =~ s/<([^>]+)>/`echo $1 | tag2re`/ge;
+$grepre =~ s/<([^>]+)>/`echo $1 | $tags.tag2re`/ge;
 
 $grepre =~ s/\./[^ [:cntrl:]]/g;
 
diff --git a/app/src/ser/ser b/app/src/ser/ser
index c50e1ff..4a8d658 100755
--- a/app/src/ser/ser
+++ b/app/src/ser/ser
@@ -25,6 +25,7 @@ my $macros=0;
 my $flextemplate=0;
 my $flex=0;
 my $morfield='lem';
+my $tags=0;
 
 #read configuration files###########################
 my $file;
@@ -55,6 +56,9 @@ foreach $file ($systemconfigfile, $userconfigfile){
     		elsif($name eq "flex-template"){
 			$flextemplate=$value;
     		}
+    		elsif($name eq "tags"){
+    			$tags=$value;
+    		}
     		elsif($name eq "flex"){
 			$flex=1;
     		}
@@ -74,6 +78,7 @@ GetOptions("pattern|e=s" => \$pattern,
            "no-markers|M" => \$no_markers,
 	   "macros=s" => \$macros,
 	   "flex-template=s" => \$flextemplate,
+	   "tags=s" => \$tags,
 	   "flex" => \$flex,
 	   "help|h" => \$help);
 
@@ -88,6 +93,7 @@ Options:
    --morph=STRING                 Field containing morphological information (default 'lem').
    --macros=FILE                  Read macrodefinitions from FILE.
    --flex-template=FILE           Read flex code template from FILE.
+   --tags=STRING                  Morphosyntactic tag format.
    --only-matching -m		  Print only fragments matching PATTERN.
    --no-markers -M                Do not print BOM and EOM markers [TODO].
    --flex                         Print only the generated flex code and exit.
@@ -107,6 +113,12 @@ die("$0: macro file not found") unless
     $macros or
     -e "$LIB_DIR/terms.m4" and $macros="$LIB_DIR/terms.m4";
 
+die("$0: $tags.tag2re program not found") unless
+    1; #JAK NAPISAC WARUNEK???
+
+die("$0: undefined tagset format (tags option missing)") unless
+    $tags;
+
 
 #$pattern =~ s/cat\(([^)]+)\)/'cat('.pre($1).')'/ge;
 # quoting escaped commas /NIE DZIAŁA/
@@ -127,7 +139,7 @@ die("Incorrect pattern (m4).") if $? >> 8;
 chomp $flexpattern;
 
 # <> expansion
-$flexpattern =~ s/<([^>]+)>/`echo $1 | tag2re`/ge;
+$flexpattern =~ s/<([^>]+)>/`echo $1 | $tags.tag2re`/ge;
 
 # restricting the value of the . special symbol
 $flexpattern =~ s/\./[^ \\t\\n\\r\\f]/g;