diff --git a/mlist_to_mml.lua b/luamml-convert.lua
similarity index 99%
rename from mlist_to_mml.lua
rename to luamml-convert.lua
index a1ba373..3451628 100644
--- a/mlist_to_mml.lua
+++ b/luamml-convert.lua
@@ -1,5 +1,5 @@
-local remap_comb = require'remap_comb'
-local stretchy = require'stretchy'
+local remap_comb = require'luamml-data-combining'
+local stretchy = require'luamml-data-stretchy'
 
 local properties = node.get_properties_table()
 
diff --git a/remap_comb.lua b/luamml-data-combining.lua
similarity index 100%
rename from remap_comb.lua
rename to luamml-data-combining.lua
diff --git a/stretchy.lua b/luamml-data-stretchy.lua
similarity index 100%
rename from stretchy.lua
rename to luamml-data-stretchy.lua
diff --git a/luamml-legacy-mappings.lua b/luamml-legacy-mappings.lua
new file mode 100644
index 0000000..c969a8d
--- /dev/null
+++ b/luamml-legacy-mappings.lua
@@ -0,0 +1,51 @@
+-- local remap_ot1 = {
+  -- 0x0393, 0x0394, 0x0398, 0x039B, 0x039E, 0x03A0, 0x03A3, 0x03A5,
+  -- 0x03A6, 0x03A8, 0x03A9, nil, nil, nil, nil, nil,
+-- }
+
+local remap_oml = { [0] =
+  -- Greek italic
+  0x1D6E4, 0x1D6E5, 0x1D6E9, 0x1D6EC, 0x1D6EF, 0x1D6F1, 0x1D6F4, 0x1D6F6,
+  0x1D6F7, 0x1D6F9, 0x1D6FA, 0x1D6FC, 0x1D6FD, 0x1D6FE, 0x1D6FF, 0x1D716,
+  0x1D701, 0x1D702, 0x1D703, 0x1D704, 0x1D705, 0x1D706, 0x1D707, 0x1D708,
+  0x1D709, 0x1D70B, 0x1D70C, 0x1D70E, 0x1D70F, 0x1D710, 0x1D719, 0x1D712,
+  0x1D713, 0x1D714, 0x1D700, 0x1D717, 0x1D71B, 0x1D71A, 0x1D70D, 0x1D711,
+  -- Symbols. (The nils are hook parts)
+  0x21BC, 0x21BD, 0x21C0, 0x21C1, nil, nil, 0x22BB, 0x22BC,
+  -- old style numerals (nobody should ever use these in math) and some punctuation
+  nil, nil, nil, nil, nil, nil, nil, nil,
+  nil, nil, 0x2E, 0x2C, 0x3C, 0x2F, 0x3E, 0x226D,
+  -- letters filled up with symbols
+  0x2202, 0x1D434, 0x1D435, 0x1D436, 0x1D437, 0x1D438, 0x1D439, 0x1D43A,
+  0x1D43B, 0x1D43C, 0x1D43D, 0x1D43E, 0x1D43F, 0x1D440, 0x1D441, 0x1D442,
+  0x1D443, 0x1D444, 0x1D445, 0x1D446, 0x1D447, 0x1D448, 0x1D449, 0x1D44A,
+  0x1D44B, 0x1D44C, 0x1D44D, 0x266D, 0x266E, 0x266F, 0x2323, 0x2322,
+  0x2113, 0x1D44E, 0x1D44F, 0x1D450, 0x1D451, 0x1D452, 0x1D453, 0x1D454,
+  0x210E, 0x1D456, 0x1D457, 0x1D458, 0x1D459, 0x1D45A, 0x1D45B, 0x1D45C,
+  0x1D45D, 0x1D45E, 0x1D45F, 0x1D460, 0x1D461, 0x1D462, 0x1D463, 0x1D464,
+  0x1D465, 0x1D466, 0x1D467, 0x1D6A4, 0x1D6A5, 0x2118, 0x2192, nil,
+}
+
+local remap_oms = { [0] =
+  0x2212, 0x22C5, 0xD7, 0x2A, 0xF7, 0x22C4, 0xB1, 0x2213,
+  0x2295, 0x2296, 0x2297, 0x2298, 0x2299, 0x25CB, 0x2218, 0x2219,
+  0x224D, 0x2261, 0x2286, 0x2287, 0x2264, 0x2265, 0x2AAF, 0x2AB0,
+  0x223C, 0x2248, 0x2282, 0x2283, 0x226A, 0x226B, 0x227A, 0x227B,
+  0x2190, 0x2192, 0x2191, 0x2193, 0x2194, 0x2197, 0x2198, 0x2243,
+  0x21D0, 0x21D2, 0x21D1, 0x21D3, 0x21D4, 0x2196, 0x2199, 0x221D,
+  0x2032, 0x221E, 0x2208, 0x220B, 0x25B3, 0x25BD, 0x0338, 0x21A6,
+  0x2200, 0x2203, 0xAC, 0x2205, 0x211C, 0x22A9, 0x22A4, 0x22A5,
+  0x2135, 0x1D49C, 0x212C, 0x1D49E, 0x1D49F, 0x2130, 0x2131, 0x1D4A2,
+  0x210B, 0x2110, 0x1D4A5, 0x1D4A6, 0x2112, 0x2133, 0x1D4A9, 0x1D4AA,
+  0x1D4AB, 0x1D4AC, 0x211B, 0x1D4AE, 0x1D4AF, 0x1D4B0, 0x1D4B1, 0x1D4B2,
+  0x1D4B3, 0x1D4B4, 0x1D4B5, 0x222A, 0x2229, 0x228E, 0x2227, 0x2228,
+  0x22A2, 0x22A3, 0x230A, 0x230B, 0x2308, 0x2309, 0x7B, 0x7D,
+  0x27E8, 0x27E9, 0x7C, 0x2016, 0x2195, 0x21D5, 0x5C, 0x2240,
+  0x221A, 0x2210, 0x2207, 0x222B, 0x2294, 0x2293, 0x2291, 0x2292,
+  0xA7, 0x2020, 0x2021, 0xB6, 0x2663, 0x2662, 0x2661, 0x2660,
+}
+
+return {
+  oml = remap_oml,
+  oms = remap_oms,
+}
diff --git a/test_tex.lua b/luamml-tex.lua
similarity index 79%
rename from test_tex.lua
rename to luamml-tex.lua
index 697172b..6fbf975 100644
--- a/test_tex.lua
+++ b/luamml-tex.lua
@@ -1,12 +1,9 @@
-local inspect = require'inspect'
-local function show(t) return print(inspect(t)) end
-
-local mlist_to_mml = require'mlist_to_mml'
+local mlist_to_mml = require'luamml-convert'
 local process_mlist = mlist_to_mml.process
 local register_family = mlist_to_mml.register_family
 
-local mappings = require'remap'
-local write_xml = require'write_xml'
+local mappings = require'luamml-legacy-mappings'
+local write_xml = require'luamml-xmlwriter'
 
 local funcid = luatexbase.new_luafunction'RegisterFamilyMapping'
 token.set_lua('RegisterFamilyMapping', funcid, 'protected')
diff --git a/write_xml.lua b/luamml-xmlwriter.lua
similarity index 87%
rename from write_xml.lua
rename to luamml-xmlwriter.lua
index f67db4e..98587ff 100644
--- a/write_xml.lua
+++ b/luamml-xmlwriter.lua
@@ -3,7 +3,6 @@ local function escape_name(name)
   return name
 end
 
--- FIXME: Not sure yet if this will be needed
 local escapes = {
   ['"'] = """,
   ['<'] = "&lt;",
@@ -41,4 +40,7 @@ local function write_elem(tree, indent)
   return out .. '</' .. escaped_name .. '>'
 end
 
-return write_elem
+return function(element, indent, version)
+  return (version == '11' and '<?xml version="1.1"?>' or '') ..
+    write_elem(element, indent and '' or nil)
+end
diff --git a/test_tex.tex b/test_tex.tex
index bd945a2..af6dd48 100644
--- a/test_tex.tex
+++ b/test_tex.tex
@@ -1,6 +1,6 @@
 \documentclass{article}
 % \usepackage{unicode-math}
-\directlua{require'test_tex'}
+\directlua{require'luamml-tex'}
 \RegisterFamilyMapping\symsymbols{oms}
 \RegisterFamilyMapping\symletters{oml}
 \begin{document}
diff --git a/test_xml.lua b/test_xml.lua
deleted file mode 100644
index f513cb1..0000000
--- a/test_xml.lua
+++ /dev/null
@@ -1,16 +0,0 @@
-local write_xml = require'write_xml'
-
-print(write_xml{[0] = "math", xmlns = "http://www.w3.org/1998/Math/MathML",
-    {[0] = "mi", "a"},
-    {[0] = "msup",
-      {[0] = "mi", "x"},
-      {[0] = "mn", "2"},
-    },
-    {[0] = "mo", "+"},
-    {[0] = "mi", "b"},
-    {[0] = "mi", "x"},
-    {[0] = "mo", "+"},
-    {[0] = "mi", "c"},
-    {[0] = "mo", "="},
-    {[0] = "mn", "0"},
-  })