diff --git a/src/filters/Makefile.am.orig b/src/filters/Makefile.am.orig
new file mode 100644
index 000000000..16adb99fa
--- /dev/null
+++ b/src/filters/Makefile.am.orig
@@ -0,0 +1,55 @@
+## Process this file with automake to produce Makefile.in
+
+## Copyright (C) 2011 Samediggi
+
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#########################################################
+############## BEGIN: Local modifications ###############
+
+# List any local filter regex files here:
+GIELLA_FILTER_LOCAL_REGEX_SRCS=\
+					downcase_UCletters.regex \
+					remove-derivation-position-tags.regex \
+					rename-POS_before_Der-tags.regex
+
+# List any local filter xfscript files here:
+GIELLA_FILTER_LOCAL_XFSCRIPT_SRCS=
+
+# List any local filter lexc files here:
+GIELLA_FILTER_LOCAL_LEXC_SRCS=
+
+# List any locally generated regex source files here:
+GIELLA_FILTER_LOCAL_GENERATED_REGEX_SRCS=
+
+# List any locally generated xfscript source files here:
+GIELLA_FILTER_LOCAL_GENERATED_XFSCRIPT_SRCS=
+
+# List any locally generated lexc source files here:
+GIELLA_FILTER_LOCAL_GENERATED_LEXC_SRCS=
+
+# List any additional source files here, so that they are included in the dist.
+# Source files that are not directly compiled to fst's but are instead used as
+# part of a local build step should be listed here.
+EXTRA_SRCS=
+
+########## Add local build rules below here: ############
+
+############### END: Local modifications ################
+#########################################################
+
+# Included build file, where the actual build instructions are:
+include $(top_srcdir)/../giella-core/am-shared/src-filters-dir-include.am
+
+# vim: set ft=automake:
diff --git a/src/filters/Makefile.am.rej b/src/filters/Makefile.am.rej
new file mode 100644
index 000000000..5ef8d2a45
--- /dev/null
+++ b/src/filters/Makefile.am.rej
@@ -0,0 +1,15 @@
+--- src/filters/Makefile.am
++++ src/filters/Makefile.am
+@@ -20,7 +20,11 @@
+ 
+ # List any local filter regex files here:
+ GIELLA_FILTER_LOCAL_REGEX_SRCS=\
+-					downcase_UCletters.regex
++					downcase_UCletters.regex\
++					remove-derivation-position-tags.regex \
++					remove-DNorm-tags.regex \
++					remove-norm-comp-tags.regex \
++					rename-POS_before_Der-tags.regex
+ 
+ # List any local filter xfscript files here:
+ GIELLA_FILTER_LOCAL_XFSCRIPT_SRCS=
diff --git a/src/filters/remove-DNorm-tags.regex b/src/filters/remove-DNorm-tags.regex
new file mode 100644
index 000000000..456f3ed6e
--- /dev/null
+++ b/src/filters/remove-DNorm-tags.regex
@@ -0,0 +1,18 @@
+! Divvun & Giellatekno - open source grammars for Sámi and other languages
+! Copyright © 2000-2010 The University of Tromsø & the Norwegian Sámi Parliament
+! http://giellatekno.uit.no & http://divvun.no
+!
+! This program is free software; you can redistribute and/or modify
+! this file under the terms of the GNU General Public License as published by
+! the Free Software Foundation, either version 3 of the License, or
+! (at your option) any later version. The GNU General Public License
+! is found at http://www.gnu.org/licenses/gpl.html. It is
+! also available in the file $GTHOME/LICENSE.txt.
+!
+! Other licensing options are available upon request, please contact
+! giellatekno@uit.no or feedback@divvun.no
+
+# This filter removes Rel-Foc combinations.
+
+0 <- %+Use%/NotDNorm,
+0 <- %+Use%/DNorm;
diff --git a/src/filters/remove-norm-comp-tags.regex b/src/filters/remove-norm-comp-tags.regex
new file mode 100644
index 000000000..8f83ca91c
--- /dev/null
+++ b/src/filters/remove-norm-comp-tags.regex
@@ -0,0 +1,23 @@
+# This regex removes tags we do not want in the ordinary $(GTLANG).fst
+# That is, we do not give them as output from analysis
+
+# delete normative tags governing compound behaviour
+# -N- in the tag name stands for Normative
+0 <- %+CmpNP%/All,
+0 <- %+CmpNP%/First,
+0 <- %+CmpNP%/Pref,
+0 <- %+CmpNP%/Last,
+0 <- %+CmpNP%/Suff,
+0 <- %+CmpNP%/None,
+0 <- %+CmpNP%/Only,
+0 <- %+CmpN%/SgN,
+0 <- %+CmpN%/SgG,
+0 <- %+CmpN%/PlG,
+0 <- %+CmpN%/SgNomLeft,
+0 <- %+CmpN%/SgGenLeft,
+0 <- %+CmpN%/PlGenLeft,
+0 <- %+CmpN%/Def,
+0 <- %+CmpN%/DefSgNom,
+0 <- %+CmpN%/DefSgGen,
+0 <- %+CmpN%/DefPlGen
+;