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diff --git a/arabluatex_trans.lua b/arabluatex_trans.lua
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+++ b/arabluatex_trans.lua
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+--[[
+This file is part of the `arabluatex' package
+
+copyright (C) 2016  Robert Alessi
+
+Please send error reports and suggestions for improvements to
+Robert Alessi <alessi@robertalessi.net>
+
+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 2
+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, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.
+--]]
+
+hamzatrdmg = {
+   -- initial long u
+   {a="%'%_U", b="ʾU"},
+   -- madda (historic writing below)
+   {a="'A", b="ʾA"},
+   {a="(A)(')(i)$", b="%1ʾ%3"},
+   {a="(A)(')(i)(%W)", b="%1ʾ%3%4"},
+   {a="(A)(')(i)", b="%1ʾ%3"}, -- historic madda
+   {a="(A)(')", b="%1ʾ"}, -- historic madda
+   -- initial (needs both ^ and %W patterns)
+   {a="^(')([ua])", b="ʾ%2"},
+   {a="^(')(i)", b="ʾ%2"},
+   {a="(%W)(')([ua])", b="%1ʾ%3"},
+   {a="(%W)(')(i)", b="%1ʾ%3"},
+   -- final
+   {a="([Iy])(')(aN)$", b="%1ʾ%3"},
+   {a="([Iy])(')(aN)(%W)", b="%1ʾ%3%4"},
+   {a="([^uai])(')([uai]N?)$", b="%1ʾ%3"},
+   {a="([^uai])(')([uai]N?)(%W)", b="%1ʾ%3%4"},
+   {a="([UI])(')([uai])$", b="%1ʾ%3"},
+   {a="([UI])(')([uai])(%W)", b="%1ʾ%3%4"},
+   -- middle
+   {a="(U)(')", b="%1ʾ"},
+   {a="([Iy])(')", b="%1ʾ"},
+   {a="([^uai])(')([uU])", b="%1ʾ%3"},
+   {a="([^uai])(')([aA])", b="%1ʾ%3"},
+   {a="([^uai])(')([iI])", b="%1ʾ%3"},
+   {a="(u)(')([uU])", b="%1ʾ%3"},
+   {a="(u)(')([aA])", b="%1ʾ%3"},
+   {a="(u)(')([iI])", b="%1ʾ%3"},
+   {a="(a)(')([aA])", b="%1ʾ%3"},
+   {a="(a)(')([uU])", b="%1ʾ%3"},
+   {a="(a)(')([iI])", b="%1ʾ%3"},
+   {a="(i)(')([aA])", b="%1ʾ%3"},
+   {a="(i)(')([uU])", b="%1ʾ%3"},
+   {a="(i)(')([iI])", b="%1ʾ%3"},
+   {a="(a)(')([^uaiUAI])", b="%1ʾ%3"},
+   {a="(u)(')([^uaiUAI])", b="%1ʾ%3"},
+   {a="(i)(')([^uaiUAI])", b="%1ʾ%3"}
+}
+
+trigraphstrdmg = { -- trigraphs or more
+   -- 'llatI / 'llad_I
+   {a="^'ll(a)([%_]?[dt])", b="'ll%1%2"},
+   {a="(%s)'ll(a)([%_]?[dt])", b="%1'll%2%3"},
+   -- al- + lām
+   {a="^(a)l%-(l)", b="%1l-%2%2"},
+   {a="(%s)(a)l%-(l)", b="%1%2l-%3%3"},
+   -- al- + solar consonant
+   {a="^(a)l%-([%_%^%.]?[tdrzsn])", b="%1%2-%2"},
+   {a="(%s)(a)l%-([%_%^%.]?[tdrzsn])", b="%1%2%3-%3"},
+   -- assim. art. + solar consonant
+   {a="^(a)([%_%^%.]?[tdrzsn])%-", b="%1%2-%2"},
+   {a="(%s)(a)([%_%^%.]?[tdrzsn])%-", b="%1%2%3-%3"},
+   -- al- + initial unstable hamza
+   {a="^(a)l%-([uai])", b="%1l-%2"},
+   {a="(%s)(a)l%-([uai])", b="%1%2l-%3"},
+   -- li- + art. + initial unstable hamza is a special orthography
+   {a="l(i)%-l%-([uai])", b="l%1-l-%2"},
+   -- al- + lunar consonant (i.e. what remains)
+   {a="^(a)l%-", b="%1l-"},
+   {a="(%s)(a)l%-", b="%1%2l-"},
+   -- art. with waṣla + lām
+   {a="'l%-(l)", b="'l-%1"},
+   -- art. with waṣla + solar consonant
+   {a="'l%-([%_%^%.]?[tdrzsn])", b="'%1-"},
+   -- li- + art. + lām
+   {a="l(i)%-l%-(l)", b="l%1-l-%2%2"},
+   -- assim. art. with waṣla + solar consonant
+   {a="'([%_%^%.]?[tdrzsn])%-", b="'%1-%1"},
+   -- li- + art. + solar consonant is a special orthography
+   {a="l(i)%-l%-([%_%^%.]?[tdrzsn])", b="l%1-%2-%2"},
+   -- li- + assim. art. + solar consonant is a special orthography
+   {a="l(i)%-([%_%^%.]?[tdrzsn])%-([%_%^%.]?[tdrzsn])", b="l%1-%2-%3"},
+   -- art. with waṣla + initial unstable hamza
+   {a="'l%-([uai])", b="'l-%1"},   
+   -- art. with waṣla + lunar consonant (i.e. what remains)
+   {a="'l%-", b="'l-"}
+}
+
+tanwintrdmg = {
+        {a="uN", b="un"},
+        {a="(aN)(_A)", b="an"},
+        {a="(aN)(Y)", b="an"},
+        {a="(T)(aN)", b="tan"},
+        {a="([^TA])(aN)", b="%1an"},
+        {a="iN", b="in"}
+}
+
+digraphstrdmg = {
+   {a="(%-)([uai])", b="%1%2"}, -- hyphen + initial alif without hamza
+   {a="^([uai])", b="%1"},      -- initial alif without hamza
+   {a="(%s)([uai])", b="%1%2"}, -- initial alif without hamza
+   {a="%-%-", b=""},
+   {a="T([^uai])", b="%1"},
+   {a="_t", b="ṯ"},
+   {a="%^g", b="ǧ"},
+   {a="%.h", b="ḥ"},
+   {a="_h", b="ḫ"},
+   {a="_d", b="ḏ"},
+   {a="%^s", b="š"},
+   {a="%.s", b="ṣ"},
+   {a="%.d", b="ḍ"},
+   {a="%.t", b="ṭ"},
+   {a="%.z", b="ẓ"},
+   {a="%.g", b="ġ"},
+   {a="(U)(A)", b="ū"},
+   {a="WA", b="ū"},
+   {a="(a)W", b="%1w"},
+   {a="_A", b="ā"},
+   {a="_u", b="ū"},
+   {a="_a", b="ā"},
+   {a="_i", b="ī"}
+}
+
+singletrdmg = {
+        {a="b", b="b"},
+        {a="t", b="t"},
+        {a="j", b="ǧ"},
+        {a="x", b="ḫ"},
+        {a="d", b="d"},
+        {a="r", b="r"},
+        {a="z", b="z"},
+        {a="s", b="s"},
+        {a="`", b="ʿ"},
+        {a="f", b="f"},
+        {a="q", b="q"},
+        {a="k", b="k"},
+        {a="l", b="l"},
+        {a="m", b="m"},
+        {a="n", b="n"},
+        {a="h", b="h"},
+        {a="w", b="w"},
+        {a="y", b="y"},
+        {a="T", b="t"},
+        {a="Y", b="ā"},
+        {a='"', b=''},
+}
+
+longvtrdmg = {
+        {a="A", b="ā"},
+        {a="U", b="ū"},
+        {a="I", b="ī"}
+}
+
+shortvtrdmg = {
+        {a="u", b="u"},
+        {a="a", b="a"},
+        {a="i", b="i"}
+}
+
+
+-- return {
+-- raw = raw,
+-- hamza = hamza,
+-- trigraphs = trigraphs,
+-- tanwin = tanwin,
+-- digraphs = digraphs,
+-- single = single,
+-- longv = longv,
+-- shortv = shortv,
+-- null =null
+-- }