diff --git a/.appveyor.yml b/.appveyor.yml
new file mode 100644
index 00000000..913363b9
--- /dev/null
+++ b/.appveyor.yml
@@ -0,0 +1,50 @@
+environment:
+  matrix:
+    - PYTHON: "C:\\Python34"
+      PYTHON_VERSION: "3.4.x" # currently 3.4.3
+      PYTHON_ARCH: "32"
+
+install:
+  # Download setup scripts and unzip
+  - ps: "wget https://github.com/cloudify-cosmo/appveyor-utils/archive/master.zip -OutFile ./master.zip"
+  - "7z e master.zip */appveyor/* -oappveyor"
+
+  # Install Python (from the official .msi of http://python.org) and pip when
+  # not already installed.
+  - "powershell ./appveyor/install.ps1"
+
+  # Prepend newly installed Python to the PATH of this build (this cannot be
+  # done from inside the powershell script as it would require to restart
+  # the parent CMD process).
+  - "SET PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%"
+
+  # Check that we have the expected version and architecture for Python
+  - "python --version"
+  - "python -c \"import struct; print(struct.calcsize('P') * 8)\""
+
+  # Download miktex portable (if not cached)
+  - ps: "If (!(Test-Path miktex-portable.exe)){wget http://mirrors.ctan.org/systems/win32/miktex/setup/miktex-portable-2.9.5719.exe -OutFile ./miktex-portable.exe}"
+
+  # Unzip miktex portable
+  - "7z x miktex-portable.exe * -aot -omiktex > nul"
+
+  # Let the binaries be directly callable
+  - cmd: set PATH=%PATH%;C:\projects\patacrep\miktex\miktex\bin
+
+  # Update fonts
+  - cmd: luaotfload-tool.exe --update
+
+  # Manually install required texlive packages
+  - cmd: mpm.exe --install-some texlive_packages.txt
+
+build: false  # Not a C# project, build stuff at the test step instead.
+
+before_test:
+  - "pip install tox"
+
+test_script:
+  - "tox"
+
+# Cache Miktex Portable file
+cache:
+- C:\projects\patacrep\miktex-portable.exe
\ No newline at end of file
diff --git a/examples/songs/chevaliers_de_la_table_ronde.sg b/examples/songs/chevaliers_de_la_table_ronde.sg
index 77dfa869..81a725ef 100644
--- a/examples/songs/chevaliers_de_la_table_ronde.sg
+++ b/examples/songs/chevaliers_de_la_table_ronde.sg
@@ -1,7 +1,7 @@
 \selectlanguage{french}
 \songcolumns{2}
 \beginsong{Chevaliers de la table ronde}
-  [by={Traditionnel},cov={traditionnel},album={France}]
+  [by={Traditionnel},cover={traditionnel},album={France}]
 
   \cover
   \gtab{C}{X32010}
diff --git a/examples/songs/example-en.sg b/examples/songs/example-en.sg
index 7009cc68..971507a6 100644
--- a/examples/songs/example-en.sg
+++ b/examples/songs/example-en.sg
@@ -24,7 +24,7 @@
 % traditionnel : the file "8-bit-lagerfeuer.jpg" that corresponds to the album art
 % 8 bit lagerfeuer : the album whose song is extracted from 
 \beginsong{Sad robot}
-  [by={Pornophonique},cov={traditionnel},album={8 bit lagerfeuer}]
+  [by={Pornophonique},cover={traditionnel},album={8 bit lagerfeuer}]
 
   % inserts the album art (8-bit-lagerfeuer.jpg)
   \cover
diff --git a/examples/songs/example-fr.sg b/examples/songs/example-fr.sg
index c9264096..a0d68b58 100644
--- a/examples/songs/example-fr.sg
+++ b/examples/songs/example-fr.sg
@@ -26,7 +26,7 @@
 % traditionnel : le fichier "8-bit-lagerfeuer.jpg" correspondant à la pochette de l'album
 % 8 bit lagerfeuer : le nom de l'album dont la chanson est extraite
 \beginsong{Sad robot}
-  [by={Pornophonique},cov={traditionnel},album={8 bit lagerfeuer}]
+  [by={Pornophonique},cover={traditionnel},album={8 bit lagerfeuer}]
 
   % insère la pochette de l'album (8-bit-lagerfeuer.jpg)
   \cover
diff --git a/examples/songs/greensleeves.sg b/examples/songs/greensleeves.sg
index 469fab99..2d9f3c19 100644
--- a/examples/songs/greensleeves.sg
+++ b/examples/songs/greensleeves.sg
@@ -1,7 +1,7 @@
 \selectlanguage{english}
 \songcolumns{2}
 \beginsong{Greensleeves}
-  [by={Traditionnel},cov={traditionnel},album={Angleterre}]
+  [by={Traditionnel},cover={traditionnel},album={Angleterre}]
 
   \cover
   \gtab{Am}{X02210}
diff --git a/examples/songs/vent_frais.sg b/examples/songs/vent_frais.sg
index 36584ad7..662a9ea2 100644
--- a/examples/songs/vent_frais.sg
+++ b/examples/songs/vent_frais.sg
@@ -1,7 +1,7 @@
 \selectlanguage{french}
 \songcolumns{2}
 \beginsong{Vent frais}
-  [by={Traditionnel},cov={traditionnel},album={France}]
+  [by={Traditionnel},cover={traditionnel},album={France}]
 
   \cover
   \gtab{Dm}{XX0231}
diff --git a/patacrep/__init__.py b/patacrep/__init__.py
index e63b5123..60e4cd6a 100644
--- a/patacrep/__init__.py
+++ b/patacrep/__init__.py
@@ -17,3 +17,6 @@ __version__ = '.'.join([str(number) for number in __TUPLE_VERSION__])
 # etc.)
 
 __DATADIR__ = os.path.abspath(resource_filename(__name__, 'data'))
+def pkg_datapath(*path):
+    """Return the package data path"""
+    return os.path.join(__DATADIR__, *path)
diff --git a/patacrep/build.py b/patacrep/build.py
index 99e8190a..a720b9b1 100644
--- a/patacrep/build.py
+++ b/patacrep/build.py
@@ -6,7 +6,7 @@ import glob
 import logging
 import threading
 import os.path
-from subprocess import Popen, PIPE, call
+from subprocess import Popen, PIPE, call, check_call
 
 from patacrep import __DATADIR__, authors, content, errors, files
 from patacrep.index import process_sxd
@@ -213,13 +213,27 @@ class SongbookBuilder(object):
         LOGGER.info("Building '{}.pdf'…".format(self.basename))
         self._run_once(self._set_latex)
 
+        compiler = "lualatex"
+
+        # Test if the LaTeX compiler is accessible
+        try:
+            check_call(
+                [compiler, "--version"],
+                stdin=PIPE,
+                stdout=PIPE,
+                stderr=PIPE,
+                universal_newlines=True,
+                )
+        except Exception as error:
+            raise errors.ExecutableNotFound(compiler)
+
+        # Perform compilation
         try:
             process = Popen(
-                ["lualatex"] + self._lualatex_options + [self.basename],
+                [compiler] + self._lualatex_options + [self.basename],
                 stdin=PIPE,
                 stdout=PIPE,
                 stderr=PIPE,
-                env=os.environ,
                 universal_newlines=True,
                 )
         except Exception as error:
diff --git a/patacrep/content/song.py b/patacrep/content/song.py
index 71473aa8..4f9ab809 100755
--- a/patacrep/content/song.py
+++ b/patacrep/content/song.py
@@ -42,7 +42,7 @@ class SongRenderer(Content):
                 {song}
                 """).format(
                     separator="%"*80,
-                    path=self.song.subpath,
+                    path=files.path2posix(self.song.subpath),
                     song=self.song.render(output=context['filename']),
                 )
 
diff --git a/patacrep/songs/chordpro/data/chordpro/content_chord b/patacrep/data/ast_templates/chordpro/chordpro/content_chord
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/content_chord
rename to patacrep/data/ast_templates/chordpro/chordpro/content_chord
diff --git a/patacrep/songs/chordpro/data/chordpro/content_chordlist b/patacrep/data/ast_templates/chordpro/chordpro/content_chordlist
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/content_chordlist
rename to patacrep/data/ast_templates/chordpro/chordpro/content_chordlist
diff --git a/patacrep/songs/chordpro/data/chordpro/content_comment b/patacrep/data/ast_templates/chordpro/chordpro/content_comment
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/content_comment
rename to patacrep/data/ast_templates/chordpro/chordpro/content_comment
diff --git a/patacrep/songs/chordpro/data/chordpro/content_define b/patacrep/data/ast_templates/chordpro/chordpro/content_define
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/content_define
rename to patacrep/data/ast_templates/chordpro/chordpro/content_define
diff --git a/patacrep/songs/chordpro/data/chordpro/content_endofline b/patacrep/data/ast_templates/chordpro/chordpro/content_endofline
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/content_endofline
rename to patacrep/data/ast_templates/chordpro/chordpro/content_endofline
diff --git a/patacrep/songs/chordpro/data/chordpro/content_error b/patacrep/data/ast_templates/chordpro/chordpro/content_error
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/content_error
rename to patacrep/data/ast_templates/chordpro/chordpro/content_error
diff --git a/patacrep/songs/chordpro/data/chordpro/content_guitar_comment b/patacrep/data/ast_templates/chordpro/chordpro/content_guitar_comment
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/content_guitar_comment
rename to patacrep/data/ast_templates/chordpro/chordpro/content_guitar_comment
diff --git a/patacrep/songs/chordpro/data/chordpro/content_image b/patacrep/data/ast_templates/chordpro/chordpro/content_image
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/content_image
rename to patacrep/data/ast_templates/chordpro/chordpro/content_image
diff --git a/patacrep/songs/chordpro/data/chordpro/content_line b/patacrep/data/ast_templates/chordpro/chordpro/content_line
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/content_line
rename to patacrep/data/ast_templates/chordpro/chordpro/content_line
diff --git a/patacrep/songs/chordpro/data/chordpro/content_newline b/patacrep/data/ast_templates/chordpro/chordpro/content_newline
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/content_newline
rename to patacrep/data/ast_templates/chordpro/chordpro/content_newline
diff --git a/patacrep/songs/chordpro/data/chordpro/content_partition b/patacrep/data/ast_templates/chordpro/chordpro/content_partition
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/content_partition
rename to patacrep/data/ast_templates/chordpro/chordpro/content_partition
diff --git a/patacrep/songs/chordpro/data/chordpro/content_space b/patacrep/data/ast_templates/chordpro/chordpro/content_space
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/content_space
rename to patacrep/data/ast_templates/chordpro/chordpro/content_space
diff --git a/patacrep/songs/chordpro/data/chordpro/content_tablature b/patacrep/data/ast_templates/chordpro/chordpro/content_tablature
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/content_tablature
rename to patacrep/data/ast_templates/chordpro/chordpro/content_tablature
diff --git a/patacrep/songs/chordpro/data/chordpro/content_verse b/patacrep/data/ast_templates/chordpro/chordpro/content_verse
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/content_verse
rename to patacrep/data/ast_templates/chordpro/chordpro/content_verse
diff --git a/patacrep/songs/chordpro/data/chordpro/content_word b/patacrep/data/ast_templates/chordpro/chordpro/content_word
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/content_word
rename to patacrep/data/ast_templates/chordpro/chordpro/content_word
diff --git a/patacrep/songs/chordpro/data/chordpro/song b/patacrep/data/ast_templates/chordpro/chordpro/song
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/song
rename to patacrep/data/ast_templates/chordpro/chordpro/song
diff --git a/patacrep/songs/chordpro/data/chordpro/song_body b/patacrep/data/ast_templates/chordpro/chordpro/song_body
similarity index 100%
rename from patacrep/songs/chordpro/data/chordpro/song_body
rename to patacrep/data/ast_templates/chordpro/chordpro/song_body
diff --git a/patacrep/songs/chordpro/data/chordpro/song_header b/patacrep/data/ast_templates/chordpro/chordpro/song_header
similarity index 71%
rename from patacrep/songs/chordpro/data/chordpro/song_header
rename to patacrep/data/ast_templates/chordpro/chordpro/song_header
index 2ffb1d30..56ad6a3a 100644
--- a/patacrep/songs/chordpro/data/chordpro/song_header
+++ b/patacrep/data/ast_templates/chordpro/chordpro/song_header
@@ -14,16 +14,20 @@
 
 (*- for author in authors -*)
   {artist: (( author[1] )) (( author[0] ))}
-(* endfor *)
+(* endfor -*)
 
-(*- for key in ['album', 'copyright', 'tag'] *)
+(*- for key in ['album', 'copyright'] *)
   (* if key in metadata -*)
     {(( key )): (( metadata[key] ))}
   (* endif *)
 (* endfor *)
-(* if 'cov' in metadata -*)
-  {(( 'cov' )): (( metadata['cov'].argument|search_image ))}
-(* endif *)
+(* if 'cover' in metadata -*)
+  {(( 'cover' )): (( metadata['cover'].argument|search_image ))}
+(* endif -*)
+
+(* for tag in metadata.get("tag", [])|sortargs -*)
+  {tag: (( tag.argument ))}
+(* endfor -*)
 
 (*- for key in metadata.morekeys -*)
   {key: (( key.keyword )): (( key.argument ))}
diff --git a/patacrep/songs/chordpro/data/html/content_chord b/patacrep/data/ast_templates/chordpro/html/content_chord
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_chord
rename to patacrep/data/ast_templates/chordpro/html/content_chord
diff --git a/patacrep/songs/chordpro/data/html/content_chordlist b/patacrep/data/ast_templates/chordpro/html/content_chordlist
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_chordlist
rename to patacrep/data/ast_templates/chordpro/html/content_chordlist
diff --git a/patacrep/songs/chordpro/data/html/content_comment b/patacrep/data/ast_templates/chordpro/html/content_comment
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_comment
rename to patacrep/data/ast_templates/chordpro/html/content_comment
diff --git a/patacrep/songs/chordpro/data/html/content_define b/patacrep/data/ast_templates/chordpro/html/content_define
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_define
rename to patacrep/data/ast_templates/chordpro/html/content_define
diff --git a/patacrep/songs/chordpro/data/html/content_define_list b/patacrep/data/ast_templates/chordpro/html/content_define_list
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_define_list
rename to patacrep/data/ast_templates/chordpro/html/content_define_list
diff --git a/patacrep/songs/chordpro/data/html/content_endofline b/patacrep/data/ast_templates/chordpro/html/content_endofline
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_endofline
rename to patacrep/data/ast_templates/chordpro/html/content_endofline
diff --git a/patacrep/songs/chordpro/data/html/content_error b/patacrep/data/ast_templates/chordpro/html/content_error
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_error
rename to patacrep/data/ast_templates/chordpro/html/content_error
diff --git a/patacrep/songs/chordpro/data/html/content_guitar_comment b/patacrep/data/ast_templates/chordpro/html/content_guitar_comment
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_guitar_comment
rename to patacrep/data/ast_templates/chordpro/html/content_guitar_comment
diff --git a/patacrep/songs/chordpro/data/html/content_image b/patacrep/data/ast_templates/chordpro/html/content_image
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_image
rename to patacrep/data/ast_templates/chordpro/html/content_image
diff --git a/patacrep/songs/chordpro/data/html/content_line b/patacrep/data/ast_templates/chordpro/html/content_line
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_line
rename to patacrep/data/ast_templates/chordpro/html/content_line
diff --git a/patacrep/songs/chordpro/data/html/content_metadata_cover b/patacrep/data/ast_templates/chordpro/html/content_metadata_cover
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_metadata_cover
rename to patacrep/data/ast_templates/chordpro/html/content_metadata_cover
diff --git a/patacrep/songs/chordpro/data/html/content_newline b/patacrep/data/ast_templates/chordpro/html/content_newline
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_newline
rename to patacrep/data/ast_templates/chordpro/html/content_newline
diff --git a/patacrep/songs/chordpro/data/html/content_partition b/patacrep/data/ast_templates/chordpro/html/content_partition
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_partition
rename to patacrep/data/ast_templates/chordpro/html/content_partition
diff --git a/patacrep/songs/chordpro/data/html/content_space b/patacrep/data/ast_templates/chordpro/html/content_space
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_space
rename to patacrep/data/ast_templates/chordpro/html/content_space
diff --git a/patacrep/songs/chordpro/data/html/content_tablature b/patacrep/data/ast_templates/chordpro/html/content_tablature
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_tablature
rename to patacrep/data/ast_templates/chordpro/html/content_tablature
diff --git a/patacrep/songs/chordpro/data/html/content_verse b/patacrep/data/ast_templates/chordpro/html/content_verse
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_verse
rename to patacrep/data/ast_templates/chordpro/html/content_verse
diff --git a/patacrep/songs/chordpro/data/html/content_word b/patacrep/data/ast_templates/chordpro/html/content_word
similarity index 100%
rename from patacrep/songs/chordpro/data/html/content_word
rename to patacrep/data/ast_templates/chordpro/html/content_word
diff --git a/patacrep/songs/chordpro/data/html/song b/patacrep/data/ast_templates/chordpro/html/song
similarity index 100%
rename from patacrep/songs/chordpro/data/html/song
rename to patacrep/data/ast_templates/chordpro/html/song
diff --git a/patacrep/songs/chordpro/data/html/song_body b/patacrep/data/ast_templates/chordpro/html/song_body
similarity index 100%
rename from patacrep/songs/chordpro/data/html/song_body
rename to patacrep/data/ast_templates/chordpro/html/song_body
diff --git a/patacrep/songs/chordpro/data/html/song_header b/patacrep/data/ast_templates/chordpro/html/song_header
similarity index 100%
rename from patacrep/songs/chordpro/data/html/song_header
rename to patacrep/data/ast_templates/chordpro/html/song_header
diff --git a/patacrep/songs/chordpro/data/latex/content_chord b/patacrep/data/ast_templates/chordpro/latex/content_chord
similarity index 100%
rename from patacrep/songs/chordpro/data/latex/content_chord
rename to patacrep/data/ast_templates/chordpro/latex/content_chord
diff --git a/patacrep/songs/chordpro/data/latex/content_chordlist b/patacrep/data/ast_templates/chordpro/latex/content_chordlist
similarity index 100%
rename from patacrep/songs/chordpro/data/latex/content_chordlist
rename to patacrep/data/ast_templates/chordpro/latex/content_chordlist
diff --git a/patacrep/songs/chordpro/data/latex/content_comment b/patacrep/data/ast_templates/chordpro/latex/content_comment
similarity index 100%
rename from patacrep/songs/chordpro/data/latex/content_comment
rename to patacrep/data/ast_templates/chordpro/latex/content_comment
diff --git a/patacrep/songs/chordpro/data/latex/content_define b/patacrep/data/ast_templates/chordpro/latex/content_define
similarity index 100%
rename from patacrep/songs/chordpro/data/latex/content_define
rename to patacrep/data/ast_templates/chordpro/latex/content_define
diff --git a/patacrep/songs/chordpro/data/latex/content_endofline b/patacrep/data/ast_templates/chordpro/latex/content_endofline
similarity index 100%
rename from patacrep/songs/chordpro/data/latex/content_endofline
rename to patacrep/data/ast_templates/chordpro/latex/content_endofline
diff --git a/patacrep/songs/chordpro/data/latex/content_error b/patacrep/data/ast_templates/chordpro/latex/content_error
similarity index 100%
rename from patacrep/songs/chordpro/data/latex/content_error
rename to patacrep/data/ast_templates/chordpro/latex/content_error
diff --git a/patacrep/songs/chordpro/data/latex/content_guitar_comment b/patacrep/data/ast_templates/chordpro/latex/content_guitar_comment
similarity index 100%
rename from patacrep/songs/chordpro/data/latex/content_guitar_comment
rename to patacrep/data/ast_templates/chordpro/latex/content_guitar_comment
diff --git a/patacrep/songs/chordpro/data/latex/content_image b/patacrep/data/ast_templates/chordpro/latex/content_image
similarity index 58%
rename from patacrep/songs/chordpro/data/latex/content_image
rename to patacrep/data/ast_templates/chordpro/latex/content_image
index ac97404b..a567730d 100644
--- a/patacrep/songs/chordpro/data/latex/content_image
+++ b/patacrep/data/ast_templates/chordpro/latex/content_image
@@ -1,5 +1,5 @@
 (* block image *)
-(* set image = content.argument|search_image *)
+(* set image = content.argument|search_image|path2posix *)
 (* if image *)
 \image{(( image ))}
 (*- endif *)
diff --git a/patacrep/songs/chordpro/data/latex/content_line b/patacrep/data/ast_templates/chordpro/latex/content_line
similarity index 100%
rename from patacrep/songs/chordpro/data/latex/content_line
rename to patacrep/data/ast_templates/chordpro/latex/content_line
diff --git a/patacrep/songs/chordpro/data/latex/content_newline b/patacrep/data/ast_templates/chordpro/latex/content_newline
similarity index 100%
rename from patacrep/songs/chordpro/data/latex/content_newline
rename to patacrep/data/ast_templates/chordpro/latex/content_newline
diff --git a/patacrep/data/ast_templates/chordpro/latex/content_partition b/patacrep/data/ast_templates/chordpro/latex/content_partition
new file mode 100644
index 00000000..6942492a
--- /dev/null
+++ b/patacrep/data/ast_templates/chordpro/latex/content_partition
@@ -0,0 +1,6 @@
+(* block partition *)
+(* set partition = content.argument|search_partition|path2posix *)
+(* if partition *)
+\lilypond{ ((- partition -)) }
+(*- endif -*)
+(*- endblock -*)
diff --git a/patacrep/songs/chordpro/data/latex/content_space b/patacrep/data/ast_templates/chordpro/latex/content_space
similarity index 100%
rename from patacrep/songs/chordpro/data/latex/content_space
rename to patacrep/data/ast_templates/chordpro/latex/content_space
diff --git a/patacrep/songs/chordpro/data/latex/content_tablature b/patacrep/data/ast_templates/chordpro/latex/content_tablature
similarity index 100%
rename from patacrep/songs/chordpro/data/latex/content_tablature
rename to patacrep/data/ast_templates/chordpro/latex/content_tablature
diff --git a/patacrep/songs/chordpro/data/latex/content_verse b/patacrep/data/ast_templates/chordpro/latex/content_verse
similarity index 100%
rename from patacrep/songs/chordpro/data/latex/content_verse
rename to patacrep/data/ast_templates/chordpro/latex/content_verse
diff --git a/patacrep/songs/chordpro/data/latex/content_word b/patacrep/data/ast_templates/chordpro/latex/content_word
similarity index 100%
rename from patacrep/songs/chordpro/data/latex/content_word
rename to patacrep/data/ast_templates/chordpro/latex/content_word
diff --git a/patacrep/songs/chordpro/data/latex/song b/patacrep/data/ast_templates/chordpro/latex/song
similarity index 77%
rename from patacrep/songs/chordpro/data/latex/song
rename to patacrep/data/ast_templates/chordpro/latex/song
index 6f026c79..e8016107 100644
--- a/patacrep/songs/chordpro/data/latex/song
+++ b/patacrep/data/ast_templates/chordpro/latex/song
@@ -22,16 +22,16 @@
         (* endif *)
       (* endfor *)
   },
-  (* for key in ['album', 'copyright', 'tag'] *)
+  (* for key in ['album', 'copyright'] *)
   (* if key in metadata *)
   (( key ))={(( metadata[key] ))},
   (* endif *)
   (* endfor *)
-  (* if 'cov' in metadata *)
-    (* block cov *)
-      (* set cov = metadata["cov"].argument|search_image *)
-      (* if cov *)
-    cov={(( cov ))},
+  (* if 'cover' in metadata *)
+    (* block cover *)
+      (* set cover = metadata["cover"].argument|search_image|path2posix *)
+      (* if cover *)
+    cover={(( cover ))},
       (* endif *)
     (* endblock *)
   (* endif *)
@@ -40,7 +40,7 @@
   (* endfor *)
 ]
 
-(* if (metadata.cov is defined) *)
+(* if (metadata.cover is defined) *)
 \cover
 (* endif *)
 
diff --git a/patacrep/songs/chordpro/data/latex/song_body b/patacrep/data/ast_templates/chordpro/latex/song_body
similarity index 100%
rename from patacrep/songs/chordpro/data/latex/song_body
rename to patacrep/data/ast_templates/chordpro/latex/song_body
diff --git a/patacrep/data/latex/patacrep.sty b/patacrep/data/latex/patacrep.sty
index d3735739..9368d118 100644
--- a/patacrep/data/latex/patacrep.sty
+++ b/patacrep/data/latex/patacrep.sty
@@ -139,7 +139,7 @@
 \setlength{\coverspace}{0.1cm}
 \newcommand{\songcover}{}
 \newcommand{\songalbum}{}
-\newsongkey{cov}{\let\songcover\@empty}{\def\songcover{#1}}
+\newsongkey{cover}{\let\songcover\@empty}{\def\songcover{#1}}
 \newsongkey{album}{\let\songalbum\@empty}{\def\songalbum{#1}}
 \newsongkey{url}{\let\songurl\@empty}{\def\songurl{#1}}
 \newsongkey{original}{\let\songoriginal\@empty}{\def\songoriginal{#1}}
diff --git a/patacrep/errors.py b/patacrep/errors.py
index 5ec9fd9b..d1d3a74f 100644
--- a/patacrep/errors.py
+++ b/patacrep/errors.py
@@ -31,6 +31,16 @@ class TemplateError(SongbookError):
         else:
             return self.message
 
+class ExecutableNotFound(SongbookError):
+    """Couldn't find a LaTeX executable."""
+
+    def __init__(self, executable):
+        super(ExecutableNotFound, self).__init__(
+            (
+                """Could not find the following executable: {executable}"""
+                ).format(executable=executable)
+            )
+
 class StepError(SongbookError):
     """Error during execution of one compilation step."""
 
@@ -47,7 +57,7 @@ class LatexCompilationError(StepError):
     def __init__(self, basename):
         super(LatexCompilationError, self).__init__(
             (
-                """Error while pdfLaTeX compilation of "{basename}.tex" """
+                """Error while LaTeX compilation of "{basename}.tex" """
                 """(see {basename}.log for more information)."""
                 ).format(basename=basename)
             )
diff --git a/patacrep/songbook/__init__.py b/patacrep/songbook/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/patacrep/songs/chordpro/__init__.py b/patacrep/songs/chordpro/__init__.py
index c46a0880..513977f6 100644
--- a/patacrep/songs/chordpro/__init__.py
+++ b/patacrep/songs/chordpro/__init__.py
@@ -3,17 +3,22 @@
 from jinja2 import Environment, FileSystemLoader, contextfunction, ChoiceLoader
 import jinja2
 import logging
+import operator
 import os
-from pkg_resources import resource_filename
 
-from patacrep import encoding, files
+from patacrep import encoding, files, pkg_datapath
 from patacrep.songs import Song
 from patacrep.songs.chordpro.syntax import parse_song
 from patacrep.templates import Renderer
 from patacrep.latex import lang2babel
+from patacrep.files import path2posix
 
 LOGGER = logging.getLogger(__name__)
 
+def sort_directive_argument(directives):
+    """Sort directives by their argument."""
+    return sorted(directives, key=operator.attrgetter("argument"))
+
 class ChordproSong(Song):
     """Chordpro song parser"""
     # pylint: disable=abstract-method
@@ -26,7 +31,7 @@ class ChordproSong(Song):
             song = parse_song(song.read(), self.fullpath)
         self.authors = song.authors
         self.titles = song.titles
-        self.lang = song.get_data_argument('lang', self.config['lang'])
+        self.lang = song.get_data_argument('language', self.config['lang'])
         self.data = song.meta
         self.cached = {
             'song': song,
@@ -48,12 +53,14 @@ class ChordproSong(Song):
                 self.get_datadirs(os.path.join("templates", self.output_language))
             ),
             FileSystemLoader(
-                os.path.join(resource_filename(__name__, 'data'), self.output_language)
+                pkg_datapath('ast_templates', 'chordpro', self.output_language)
             ),
             ]))
         jinjaenv.filters['search_image'] = self.search_image
         jinjaenv.filters['search_partition'] = self.search_partition
         jinjaenv.filters['lang2babel'] = lang2babel
+        jinjaenv.filters['sortargs'] = sort_directive_argument
+        jinjaenv.filters['path2posix'] = path2posix
 
         try:
             return Renderer(
diff --git a/patacrep/songs/chordpro/ast.py b/patacrep/songs/chordpro/ast.py
index 9213ed37..17afc0c9 100644
--- a/patacrep/songs/chordpro/ast.py
+++ b/patacrep/songs/chordpro/ast.py
@@ -11,6 +11,27 @@ def _indent(string):
     """Return and indented version of argument."""
     return "\n".join(["  {}".format(line) for line in string.split('\n')])
 
+#: Available directives, that is, directives that we know how to deal with
+AVAILABLE_DIRECTIVES = [
+    "album",
+    "artist",
+    "capo",
+    "comment",
+    "copyright",
+    "columns",
+    "cov",
+    "define",
+    "guitar_comment",
+    "image",
+    "key",
+    "language",
+    "newline",
+    "partition",
+    "subtitle",
+    "tag",
+    "title",
+    ]
+
 #: List of properties that are to be displayed in the flow of the song (not as
 #: metadata at the beginning or end of song.
 INLINE_DIRECTIVES = {
@@ -30,8 +51,8 @@ DIRECTIVE_SHORTCUTS = {
     "by": "artist",
     "c": "comment",
     "gc": "guitar_comment",
-    "cover": "cov",
-    "language": "lang",
+    "cov": "cover",
+    "lang": "language",
     }
 
 def directive_name(text):
@@ -194,6 +215,7 @@ class Song(AST):
         "artist": "add_author",
         "key": "add_key",
         "define": "add_cumulative",
+        "tag": "add_cumulative",
         }
 
     def __init__(self, filename):
@@ -207,6 +229,7 @@ class Song(AST):
 
     def add(self, data):
         """Add an element to the song"""
+        # pylint: disable=too-many-branches
         if isinstance(data, Error):
             pass
         elif data is None:
@@ -221,6 +244,8 @@ class Song(AST):
                 self.content[0].prepend(data.strip())
         elif isinstance(data, Directive) and data.inline:
             # Add a directive in the content of the song.
+            # It is useless to check if directive is in AVAILABLE_DIRECTIVES,
+            # since it is in INLINE_DIRECTIVES.
             self.content.append(data)
         elif data.inline:
             # Add an object in the content of the song.
@@ -228,6 +253,8 @@ class Song(AST):
         elif isinstance(data, Directive):
             # Add a metadata directive. Some of them are added using special
             # methods listed in ``METADATA_ADD``.
+            if data.keyword not in AVAILABLE_DIRECTIVES:
+                LOGGER.warning("Ignoring unknown directive '{}'.".format(data.keyword))
             if data.keyword in self.METADATA_ADD:
                 getattr(self, self.METADATA_ADD[data.keyword])(data)
             else:
diff --git a/patacrep/songs/chordpro/data/latex/content_partition b/patacrep/songs/chordpro/data/latex/content_partition
deleted file mode 100644
index a3c35a3e..00000000
--- a/patacrep/songs/chordpro/data/latex/content_partition
+++ /dev/null
@@ -1,6 +0,0 @@
-(* block partition *)
-(* set partition = content.argument|search_partition *)
-(* if partition *)
-\lilypond{ ((- content.argument|search_partition -)) }
-(*- endif -*)
-(*- endblock -*)
diff --git a/setup.py b/setup.py
index 4cfaeda0..023201eb 100755
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,12 @@ setup(
         "unidecode", "jinja2", "chardet", "ply",
         ],
     setup_requires=["hgtools"],
-    include_package_data=True,
+    package_data={'patacrep': [
+        'data/ast_templates/*/*/*',
+        'data/img/*',
+        'data/latex/*',
+        'data/templates/*',
+        ]},
     entry_points={
         'console_scripts': [
             "songbook = patacrep.songbook.__main__:main",
diff --git a/test/test_chordpro/greensleeves.sgc b/test/test_chordpro/greensleeves.sgc
index 7ff25a58..aec06809 100644
--- a/test/test_chordpro/greensleeves.sgc
+++ b/test/test_chordpro/greensleeves.sgc
@@ -5,7 +5,7 @@
 {title: Un sous titre}
 {artist:  Traditionnel}
 {album: Angleterre}
-{cov: traditionnel}
+{cover: traditionnel}
 
 
 {partition: greensleeves.ly}
diff --git a/test/test_chordpro/greensleeves.tex b/test/test_chordpro/greensleeves.tex
index f582b0c8..c4bc461d 100644
--- a/test/test_chordpro/greensleeves.tex
+++ b/test/test_chordpro/greensleeves.tex
@@ -7,7 +7,7 @@ Un sous titre}[
   by={
          Traditionnel  },
   album={Angleterre},
-    cov={img/traditionnel},
+    cover={img/traditionnel},
 ]
 
 \cover
diff --git a/test/test_chordpro/invalid_directive.sgc b/test/test_chordpro/invalid_directive.sgc
new file mode 100644
index 00000000..768ee9ee
--- /dev/null
+++ b/test/test_chordpro/invalid_directive.sgc
@@ -0,0 +1 @@
+{lang: en}
diff --git a/test/test_chordpro/invalid_directive.source b/test/test_chordpro/invalid_directive.source
new file mode 100644
index 00000000..4f582c43
--- /dev/null
+++ b/test/test_chordpro/invalid_directive.source
@@ -0,0 +1,2 @@
+{foo: bar}
+{bar}
diff --git a/test/test_chordpro/invalid_directive.tex b/test/test_chordpro/invalid_directive.tex
new file mode 100644
index 00000000..bd99a922
--- /dev/null
+++ b/test/test_chordpro/invalid_directive.tex
@@ -0,0 +1,10 @@
+\selectlanguage{english}
+
+\beginsong{}[
+  by={
+  },
+]
+
+
+
+\endsong
diff --git a/test/test_chordpro/metadata.sgc b/test/test_chordpro/metadata.sgc
index 22c59f59..322a591b 100644
--- a/test/test_chordpro/metadata.sgc
+++ b/test/test_chordpro/metadata.sgc
@@ -10,7 +10,7 @@
 {artist: Texte de Jean Richepin, chanté par Georges Brassens}
 {album: Album}
 {copyright: Copyright}
-{cov: metadata_cover}
+{cover: metadata_cover}
 {key: foo: Foo}
 
 {comment: Comment}
diff --git a/test/test_chordpro/metadata.tex b/test/test_chordpro/metadata.tex
index d2a2273a..0be273f1 100644
--- a/test/test_chordpro/metadata.tex
+++ b/test/test_chordpro/metadata.tex
@@ -11,7 +11,7 @@ Subtitle5}[
         Texte de Jean Richepin, chanté par Georges Brassens  },
   album={Album},
   copyright={Copyright},
-    cov={img/test/test_chordpro/metadata_cover},
+    cover={img/test/test_chordpro/metadata_cover},
   foo={Foo},
 ]
 
diff --git a/test/test_chordpro/tags.sgc b/test/test_chordpro/tags.sgc
new file mode 100644
index 00000000..555948c9
--- /dev/null
+++ b/test/test_chordpro/tags.sgc
@@ -0,0 +1,5 @@
+{lang: en}
+{title: Tag test}
+{tag: a third tag}
+{tag: another}
+{tag: one tag}
diff --git a/test/test_chordpro/tags.source b/test/test_chordpro/tags.source
new file mode 100644
index 00000000..5408dae0
--- /dev/null
+++ b/test/test_chordpro/tags.source
@@ -0,0 +1,4 @@
+{title: Tag test}
+{tag: one tag}
+{tag: another}
+{tag: a third tag}
diff --git a/test/test_chordpro/tags.tex b/test/test_chordpro/tags.tex
new file mode 100644
index 00000000..e27a462a
--- /dev/null
+++ b/test/test_chordpro/tags.tex
@@ -0,0 +1,10 @@
+\selectlanguage{english}
+
+\beginsong{Tag test}[
+  by={
+  },
+]
+
+
+
+\endsong
diff --git a/test/test_compilation/datadir.tex.control b/test/test_compilation/datadir.tex.control
index 4f6c8521..a003cd42 100644
--- a/test/test_compilation/datadir.tex.control
+++ b/test/test_compilation/datadir.tex.control
@@ -103,7 +103,7 @@ guitar,
 Chordpro}[
   by={
   },
-    cov={img/datadir.png},
+    cover={img/datadir.png},
 ]
 
 \cover
@@ -130,7 +130,7 @@ Chordpro}[
 Chordpro}[
   by={
   },
-    cov={img/datadir2.png},
+    cover={img/datadir2.png},
 ]
 
 \cover
@@ -157,7 +157,7 @@ Chordpro}[
 Chordpro}[
   by={
   },
-    cov={@TEST_FOLDER@/datadir_datadir/songs/./relative.png},
+    cover={@TEST_FOLDER@/datadir_datadir/songs/./relative.png},
 ]
 
 \cover
@@ -184,7 +184,7 @@ Chordpro}[
 Chordpro}[
   by={
   },
-    cov={@TEST_FOLDER@/datadir_datadir/songs/./subdir/subdir.png},
+    cover={@TEST_FOLDER@/datadir_datadir/songs/./subdir/subdir.png},
 ]
 
 \cover
diff --git a/test/test_compilation/datadir_datadir/songs/datadir.sg b/test/test_compilation/datadir_datadir/songs/datadir.sg
index 933e208b..eb937410 100644
--- a/test/test_compilation/datadir_datadir/songs/datadir.sg
+++ b/test/test_compilation/datadir_datadir/songs/datadir.sg
@@ -1,5 +1,5 @@
 \beginsong{Image included from datadir\\\LaTeX}
-  [cov={img/datadir}]
+  [cover={img/datadir}]
 
   \cover
 
diff --git a/test/test_compilation/datadir_datadir/songs/datadir2.sg b/test/test_compilation/datadir_datadir/songs/datadir2.sg
index 6a805725..f37f351f 100644
--- a/test/test_compilation/datadir_datadir/songs/datadir2.sg
+++ b/test/test_compilation/datadir_datadir/songs/datadir2.sg
@@ -1,5 +1,5 @@
 \beginsong{Image included from a different datadir\\\LaTeX}
-  [cov={img/datadir2}]
+  [cover={img/datadir2}]
 
   \cover
 
diff --git a/test/test_compilation/datadir_datadir/songs/relative.sg b/test/test_compilation/datadir_datadir/songs/relative.sg
index 681b4086..3fc326f0 100644
--- a/test/test_compilation/datadir_datadir/songs/relative.sg
+++ b/test/test_compilation/datadir_datadir/songs/relative.sg
@@ -1,5 +1,5 @@
 \beginsong{Image included from song directory\\\LaTeX}
-  [cov={relative}]
+  [cover={relative}]
 
   \cover
 
diff --git a/test/test_compilation/datadir_datadir/songs/subdir/subdir.sg b/test/test_compilation/datadir_datadir/songs/subdir/subdir.sg
index f86b47b4..b2199460 100644
--- a/test/test_compilation/datadir_datadir/songs/subdir/subdir.sg
+++ b/test/test_compilation/datadir_datadir/songs/subdir/subdir.sg
@@ -1,5 +1,5 @@
 \beginsong{Image included from a nested song directory\\\LaTeX}
-  [cov={subdir}]
+  [cover={subdir}]
 
   \cover
 
diff --git a/test/test_compilation/test_compilation.py b/test/test_compilation/test_compilation.py
index dc07107a..11067c55 100644
--- a/test/test_compilation/test_compilation.py
+++ b/test/test_compilation/test_compilation.py
@@ -5,10 +5,12 @@
 import glob
 import logging
 import os
+import sys
 import subprocess
 import unittest
 
 from patacrep.encoding import open_read
+from patacrep.files import path2posix
 
 from .. import dynamic # pylint: disable=unused-import
 
@@ -67,16 +69,18 @@ class FileTest(unittest.TestCase, metaclass=dynamic.DynamicTest):
                     expected = expectfile.read().strip()
                     expected = expected.replace(
                         "@TEST_FOLDER@",
-                        os.path.dirname(__file__),
+                        path2posix(os.path.dirname(__file__)),
                         )
 
                     expected = expected.replace(
                         "@DATA_FOLDER@",
-                        subprocess.check_output(
-                            ["python", "-c", 'import patacrep, pkg_resources; print(pkg_resources.resource_filename(patacrep.__name__, "data"))'], # pylint: disable=line-too-long
-                            universal_newlines=True,
-                            cwd=os.path.dirname(songbook),
-                            ).strip(),
+                        path2posix(
+                            subprocess.check_output(
+                                [sys.executable, "-c", 'import patacrep; print(patacrep.__DATADIR__)'], # pylint: disable=line-too-long
+                                universal_newlines=True,
+                                cwd=os.path.dirname(songbook),
+                                ).strip()
+                        ),
                         )
 
                     self.assertMultiLineEqual(
@@ -108,12 +112,16 @@ class FileTest(unittest.TestCase, metaclass=dynamic.DynamicTest):
     @staticmethod
     def compile_songbook(songbook, steps=None):
         """Compile songbook, and return the command return code."""
-        command = ['python', '-m', 'patacrep.songbook', songbook, '-v']
+        command = [sys.executable, '-m', 'patacrep.songbook', songbook]
         if steps:
             command.extend(['--steps', steps])
 
+        # Continuous Integration will be verbose
+        if 'CI' in os.environ:
+            command.append('-v')
+
         try:
-            subprocess.check_output(
+            subprocess.check_call(
                 command,
                 stderr=subprocess.STDOUT,
                 universal_newlines=True,
diff --git a/texlive_packages.txt b/texlive_packages.txt
new file mode 100644
index 00000000..9320ca2e
--- /dev/null
+++ b/texlive_packages.txt
@@ -0,0 +1,18 @@
+babel-english
+babel-esperanto
+babel-french
+babel-german
+babel-latin
+babel-spanish
+fancybox
+framed
+import
+l3kernel
+l3packages
+mptopdf
+ms
+pgf
+tipa
+url
+xcolor
+xstring
\ No newline at end of file
diff --git a/tox.ini b/tox.ini
index 1b6a3337..10fb9b9b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,7 +7,7 @@ envlist = py34, lint
 
 [testenv]
 commands = {envpython} setup.py test
-passenv = TRAVIS
+passenv = TRAVIS APPVEYOR CI
 deps =
 
 [testenv:lint]