diff --git a/Makefile b/Makefile
index c80ff4f..a1b5e20 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 BUILDMODE=release
 BUILDPATH=./build/${BUILDMODE}
-LIBRARY_PATH=${BUILDPATH}/rendering:${BUILDPATH}/exploring:${BUILDPATH}/system
+LIBRARY_PATH=${BUILDPATH}/rendering:${BUILDPATH}/exploring:${BUILDPATH}/system:${BUILDPATH}/basics:${BUILDPATH}/definition
 
 all:build
 
diff --git a/src/basics/ColorRGB.cpp b/src/basics/ColorRGB.cpp
new file mode 100644
index 0000000..2fa82ec
--- /dev/null
+++ b/src/basics/ColorRGB.cpp
@@ -0,0 +1,5 @@
+#include "ColorRGB.h"
+
+ColorRGB::ColorRGB()
+{
+}
diff --git a/src/basics/ColorRGB.h b/src/basics/ColorRGB.h
new file mode 100644
index 0000000..4c2998d
--- /dev/null
+++ b/src/basics/ColorRGB.h
@@ -0,0 +1,10 @@
+#ifndef COLORRGB_H
+#define COLORRGB_H
+
+class ColorRGB
+{
+public:
+    ColorRGB();
+};
+
+#endif // COLORRGB_H
diff --git a/src/basics/basics.pro b/src/basics/basics.pro
index 9574c78..9aa230e 100644
--- a/src/basics/basics.pro
+++ b/src/basics/basics.pro
@@ -6,15 +6,17 @@
 
 QT       -= gui
 
-TARGET = basics
+TARGET = paysages_basics
 TEMPLATE = lib
 
 DEFINES += BASICS_LIBRARY
 
-SOURCES +=
+SOURCES += \
+    ColorRGB.cpp
 
 HEADERS +=\
-        basics_global.h
+        basics_global.h \
+    ColorRGB.h
 
 unix:!symbian {
     maemo5 {
diff --git a/src/definition/BaseDefinition.cpp b/src/definition/BaseDefinition.cpp
new file mode 100644
index 0000000..ada1743
--- /dev/null
+++ b/src/definition/BaseDefinition.cpp
@@ -0,0 +1,6 @@
+#include "BaseDefinition.h"
+
+BaseDefinition::BaseDefinition(BaseDefinition* parent):
+    parent(parent)
+{
+}
diff --git a/src/definition/BaseDefinition.h b/src/definition/BaseDefinition.h
new file mode 100644
index 0000000..a993fb2
--- /dev/null
+++ b/src/definition/BaseDefinition.h
@@ -0,0 +1,35 @@
+#ifndef BASEDEFINITION_H
+#define BASEDEFINITION_H
+
+#include "definition_global.h"
+#include <QVector>
+
+class PackStream;
+
+namespace paysages {
+namespace definition {
+
+/**
+ * @brief Base class for all definition containers
+ */
+class DEFINITIONSHARED_EXPORT BaseDefinition
+{
+public:
+    BaseDefinition(BaseDefinition* parent);
+    virtual ~BaseDefinition();
+
+    void addChild(BaseDefinition* child);
+    void removeChild(BaseDefinition* child);
+
+    virtual void save(PackStream* pack);
+    virtual void load(PackStream* pack);
+
+private:
+    BaseDefinition* parent;
+    QVector<BaseDefinition*> children;
+};
+
+}
+}
+
+#endif // BASEDEFINITION_H
diff --git a/src/definition/definition.pro b/src/definition/definition.pro
index 624b6bd..a3d9a03 100644
--- a/src/definition/definition.pro
+++ b/src/definition/definition.pro
@@ -11,10 +11,12 @@ TEMPLATE = lib
 
 DEFINES += DEFINITION_LIBRARY
 
-SOURCES +=
+SOURCES += \
+    BaseDefinition.cpp
 
 HEADERS +=\
-        definition_global.h
+        definition_global.h \
+    BaseDefinition.h
 
 unix:!symbian {
     maemo5 {
@@ -25,14 +27,14 @@ unix:!symbian {
     INSTALLS += target
 }
 
-win32:CONFIG(release, debug|release): LIBS += -L$$OUT_PWD/../rendering/release/ -lpaysages_rendering
-else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../rendering/debug/ -lpaysages_rendering
-else:unix: LIBS += -L$$OUT_PWD/../rendering/ -lpaysages_rendering
-INCLUDEPATH += $$PWD/../rendering
-DEPENDPATH += $$PWD/../rendering
-
 win32:CONFIG(release, debug|release): LIBS += -L$$OUT_PWD/../system/release/ -lpaysages_system
 else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../system/debug/ -lpaysages_system
 else:unix: LIBS += -L$$OUT_PWD/../system/ -lpaysages_system
 INCLUDEPATH += $$PWD/../system
 DEPENDPATH += $$PWD/../system
+
+win32:CONFIG(release, debug|release): LIBS += -L$$OUT_PWD/../basics/release/ -lpaysages_basics
+else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../basics/debug/ -lpaysages_basics
+else:unix: LIBS += -L$$OUT_PWD/../basics/ -lpaysages_basics
+INCLUDEPATH += $$PWD/../basics
+DEPENDPATH += $$PWD/../basics
diff --git a/src/definition/definition_global.h b/src/definition/definition_global.h
index a716918..81d2c02 100644
--- a/src/definition/definition_global.h
+++ b/src/definition/definition_global.h
@@ -23,9 +23,13 @@
 #ifdef __cplusplus
 namespace paysages
 {
+    namespace system {}
+    namespace basics {}
     namespace definition {}
 }
 using namespace paysages::system;
+using namespace paysages::basics;
+using namespace paysages::definition;
 #endif
 
 /* Global imports */
diff --git a/src/editing/baseform.h b/src/editing/baseform.h
index 9a46a8a..80dc3aa 100644
--- a/src/editing/baseform.h
+++ b/src/editing/baseform.h
@@ -9,7 +9,7 @@
 #include "rendering/shared/types.h"
 #include "rendering/tools/curve.h"
 #include "rendering/tools/color.h"
-#include "rendering/tools/pack.h"
+#include "PackStream.h"
 #include "rendering/tools/lighting.h"
 #include "rendering/noise.h"
 #include "rendering/layers.h"
diff --git a/src/editing/basepreview.h b/src/editing/basepreview.h
index 1993a74..69ec388 100644
--- a/src/editing/basepreview.h
+++ b/src/editing/basepreview.h
@@ -13,7 +13,7 @@
 #include "editing/common/DrawingWidget.h"
 #include "editing/common/previewrenderer.h"
 
-#include "rendering/tools/pack.h"
+#include "PackStream.h"
 #include "rendering/tools/color.h"
 
 class _ContextChoice
diff --git a/src/editing/common/mainwindow.h b/src/editing/common/mainwindow.h
index 4bdf527..c425a83 100644
--- a/src/editing/common/mainwindow.h
+++ b/src/editing/common/mainwindow.h
@@ -3,7 +3,7 @@
 
 #include <QMainWindow>
 #include <QVector>
-#include "rendering/tools/pack.h"
+#include "PackStream.h"
 
 class BaseForm;
 class FormRender;
diff --git a/src/editing/formwater.cpp b/src/editing/formwater.cpp
index 2a8238d..23c94c7 100644
--- a/src/editing/formwater.cpp
+++ b/src/editing/formwater.cpp
@@ -121,7 +121,7 @@ protected:
         cameraSetLocation(_renderer->render_camera, camera_location);
     }
 
-    static double _getWaterHeight(Renderer* renderer)
+    static double _getWaterHeight(Renderer*)
     {
         return 0.0;
     }
diff --git a/src/editing/lighting/DialogMaterialEditor.cpp b/src/editing/lighting/DialogMaterialEditor.cpp
index fc57691..f063957 100644
--- a/src/editing/lighting/DialogMaterialEditor.cpp
+++ b/src/editing/lighting/DialogMaterialEditor.cpp
@@ -69,6 +69,6 @@ void DialogMaterialEditor::commitLocalDataToScenery()
 {
 }
 
-void DialogMaterialEditor::alterRenderer(Renderer* renderer)
+void DialogMaterialEditor::alterRenderer(Renderer*)
 {
 }
diff --git a/src/editing/terrain/paintingbrush.cpp b/src/editing/terrain/paintingbrush.cpp
index 7ec28db..5c70582 100644
--- a/src/editing/terrain/paintingbrush.cpp
+++ b/src/editing/terrain/paintingbrush.cpp
@@ -76,9 +76,8 @@ double PaintingBrush::getInfluence(double relative_x, double relative_z)
     }
 }
 
-void PaintingBrush::drawPreview(QWidget* widget)
+void PaintingBrush::drawPreview(QWidget*)
 {
-
 }
 
 QString PaintingBrush::getHelpText()
diff --git a/src/editing/terrain/widgetheightmap.cpp b/src/editing/terrain/widgetheightmap.cpp
index b8fcb58..bc135ff 100644
--- a/src/editing/terrain/widgetheightmap.cpp
+++ b/src/editing/terrain/widgetheightmap.cpp
@@ -187,16 +187,16 @@ void WidgetHeightMap::mouseReleaseEvent(QMouseEvent*)
 
 void WidgetHeightMap::mouseMoveEvent(QMouseEvent* event)
 {
-    if (event->buttons() & Qt::MiddleButton)
+    /*if (event->buttons() & Qt::MiddleButton)
     {
         // Rotate around the turntable
         int move_x = event->x() - _last_mouse_x;
         int move_y = event->y() - _last_mouse_y;
 
         // TODO
-        /*_angle_h -= (double)move_x * 0.008;
-        _angle_v += (double)move_y * 0.003;*/
-    }
+        //_angle_h -= (double)move_x * 0.008;
+        //_angle_v += (double)move_y * 0.003;
+    }*/
 
     _last_mouse_x = event->x();
     _last_mouse_y = event->y();
diff --git a/src/paysages.pro b/src/paysages.pro
index 96feac6..b72099f 100644
--- a/src/paysages.pro
+++ b/src/paysages.pro
@@ -3,18 +3,19 @@ CONFIG += ordered
 
 SUBDIRS = \
     system \
+    basics \
+    definition \
     rendering \
     exploring \
     editing \
-    controlling \
-    definition \
-    basics
+    controlling
 
 unix:SUBDIRS += testing
 
-rendering.depends = system
+basics.depends = system
+definition.depends = basics
+rendering.depends = definition
 exploring.depends = rendering
-definition.depends = rendering system
 editing.depends = exploring rendering
 controlling.depends = rendering
 unix:testing.depends = rendering
diff --git a/src/rendering/Scenery.h b/src/rendering/Scenery.h
index bb8a877..3f7e6b6 100644
--- a/src/rendering/Scenery.h
+++ b/src/rendering/Scenery.h
@@ -9,7 +9,7 @@
 #include "rendering/terrain/public.h"
 #include "rendering/textures/public.h"
 #include "rendering/water/public.h"
-#include "rendering/tools/pack.h"
+#include "PackStream.h"
 #include "rendering/renderer.h"
 
 #ifdef __cplusplus
diff --git a/src/rendering/atmosphere/public.h b/src/rendering/atmosphere/public.h
index b4fb854..9a9e53f 100644
--- a/src/rendering/atmosphere/public.h
+++ b/src/rendering/atmosphere/public.h
@@ -5,7 +5,7 @@
 #include "../tools/lighting.h"
 #include "../tools/euclid.h"
 #include "../tools/color.h"
-#include "../tools/pack.h"
+#include "PackStream.h"
 #include "../layers.h"
 #include "../shared/types.h"
 
diff --git a/src/rendering/camera.h b/src/rendering/camera.h
index 9548606..41fa00d 100644
--- a/src/rendering/camera.h
+++ b/src/rendering/camera.h
@@ -2,7 +2,7 @@
 #define _PAYSAGES_CAMERA_H_
 
 #include "rendering_global.h"
-#include "tools/pack.h"
+#include "PackStream.h"
 #include "tools/euclid.h"
 #include "tools/boundingbox.h"
 
diff --git a/src/rendering/geoarea.h b/src/rendering/geoarea.h
index 01067c2..73f5da8 100644
--- a/src/rendering/geoarea.h
+++ b/src/rendering/geoarea.h
@@ -4,7 +4,7 @@
 /* Geographic area definition */
 
 #include "rendering_global.h"
-#include "tools/pack.h"
+#include "PackStream.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/src/rendering/layers.h b/src/rendering/layers.h
index 27820ce..f2bb1db 100644
--- a/src/rendering/layers.h
+++ b/src/rendering/layers.h
@@ -4,7 +4,7 @@
 /* Factorized layer management (with names) */
 
 #include "rendering_global.h"
-#include "tools/pack.h"
+#include "PackStream.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/src/rendering/noise.h b/src/rendering/noise.h
index 9612a7c..25eeb00 100644
--- a/src/rendering/noise.h
+++ b/src/rendering/noise.h
@@ -2,7 +2,7 @@
 #define _PAYSAGES_NOISE_H_
 
 #include "rendering_global.h"
-#include "tools/pack.h"
+#include "PackStream.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/src/rendering/noisenaive.h b/src/rendering/noisenaive.h
index 4d55854..2239ece 100644
--- a/src/rendering/noisenaive.h
+++ b/src/rendering/noisenaive.h
@@ -2,7 +2,7 @@
 #define _PAYSAGES_NOISENAIVE_H_
 
 #include "rendering_global.h"
-#include "tools/pack.h"
+#include "PackStream.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/src/rendering/rendering.pro b/src/rendering/rendering.pro
index e6d3055..a78c0d4 100644
--- a/src/rendering/rendering.pro
+++ b/src/rendering/rendering.pro
@@ -48,7 +48,6 @@ SOURCES += main.c \
     tools/zone.c \
     tools/texture.c \
     tools/parallel.c \
-    tools/pack.c \
     tools/memory.c \
     tools/lighting.c \
     tools/euclid.c \
@@ -96,7 +95,6 @@ HEADERS += \
     tools/zone.h \
     tools/texture.h \
     tools/parallel.h \
-    tools/pack.h \
     tools/memory.h \
     tools/lighting.h \
     tools/euclid.h \
@@ -116,3 +114,15 @@ else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../system/debug/ -l
 else:unix: LIBS += -L$$OUT_PWD/../system/ -lpaysages_system
 INCLUDEPATH += $$PWD/../system
 DEPENDPATH += $$PWD/../system
+
+win32:CONFIG(release, debug|release): LIBS += -L$$OUT_PWD/../basics/release/ -lpaysages_basics
+else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../basics/debug/ -lpaysages_basics
+else:unix: LIBS += -L$$OUT_PWD/../basics/ -lpaysages_basics
+INCLUDEPATH += $$PWD/../basics
+DEPENDPATH += $$PWD/../basics
+
+win32:CONFIG(release, debug|release): LIBS += -L$$OUT_PWD/../definition/release/ -lpaysages_definition
+else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../definition/debug/ -lpaysages_definition
+else:unix: LIBS += -L$$OUT_PWD/../definition/ -lpaysages_definition
+INCLUDEPATH += $$PWD/../definition
+DEPENDPATH += $$PWD/../definition
diff --git a/src/rendering/rendering_global.h b/src/rendering/rendering_global.h
index a82fb9c..57c5639 100644
--- a/src/rendering/rendering_global.h
+++ b/src/rendering/rendering_global.h
@@ -24,9 +24,13 @@
 namespace paysages
 {
     namespace system {}
+    namespace basics {}
+    namespace definition {}
     namespace rendering {}
 }
 using namespace paysages::system;
+using namespace paysages::basics;
+using namespace paysages::definition;
 using namespace paysages::rendering;
 #endif
 
diff --git a/src/rendering/tools/color.h b/src/rendering/tools/color.h
index 7b15a21..65dfacb 100644
--- a/src/rendering/tools/color.h
+++ b/src/rendering/tools/color.h
@@ -3,7 +3,7 @@
 
 #include "../rendering_global.h"
 #include "curve.h"
-#include "pack.h"
+#include "PackStream.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/src/rendering/tools/curve.h b/src/rendering/tools/curve.h
index 8d51ba5..3027652 100644
--- a/src/rendering/tools/curve.h
+++ b/src/rendering/tools/curve.h
@@ -2,7 +2,7 @@
 #define _PAYSAGES_TOOLS_CURVE_H_
 
 #include "../rendering_global.h"
-#include "pack.h"
+#include "PackStream.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/src/rendering/tools/euclid.h b/src/rendering/tools/euclid.h
index 45c073e..064b100 100644
--- a/src/rendering/tools/euclid.h
+++ b/src/rendering/tools/euclid.h
@@ -2,7 +2,7 @@
 #define _PAYSAGES_TOOLS_EUCLID_H_
 
 #include "../rendering_global.h"
-#include "pack.h"
+#include "PackStream.h"
 
 /*
  * Cartesian coordinates (X, Y, Z) - right handed :
diff --git a/src/rendering/tools/lighting.h b/src/rendering/tools/lighting.h
index 3b113a7..7c6e0a9 100644
--- a/src/rendering/tools/lighting.h
+++ b/src/rendering/tools/lighting.h
@@ -4,7 +4,7 @@
 #include "../rendering_global.h"
 #include "euclid.h"
 #include "color.h"
-#include "pack.h"
+#include "PackStream.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/src/rendering/tools/pack.c b/src/rendering/tools/pack.c
deleted file mode 100644
index f03723c..0000000
--- a/src/rendering/tools/pack.c
+++ /dev/null
@@ -1,195 +0,0 @@
-#include "pack.h"
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <inttypes.h>
-#include <math.h>
-#include <unistd.h>
-
-#include "color.h"
-#include "euclid.h"
-
-struct PackStream
-{
-    FILE* fd;
-    int write;
-};
-
-#define pack754_32(f) (pack754((f), 32, 8))
-#define pack754_64(f) (pack754((f), 64, 11))
-#define unpack754_32(i) (unpack754((i), 32, 8))
-#define unpack754_64(i) (unpack754((i), 64, 11))
-
-static uint64_t pack754(double f, unsigned bits, unsigned expbits)
-{
-    double fnorm;
-    int shift;
-    long long sign, exp, significand;
-    unsigned significandbits = bits - expbits - 1; // -1 for sign bit
-
-    if (f == 0.0) return 0; // get this special case out of the way
-
-    // check sign and begin normalization
-    if (f < 0) { sign = 1; fnorm = -f; }
-    else { sign = 0; fnorm = f; }
-
-    // get the normalized form of f and track the exponent
-    shift = 0;
-    while(fnorm >= 2.0) { fnorm /= 2.0; shift++; }
-    while(fnorm < 1.0) { fnorm *= 2.0; shift--; }
-    fnorm = fnorm - 1.0;
-
-    // calculate the binary form (non-double) of the significand data
-    significand = fnorm * ((1LL<<significandbits) + 0.5f);
-
-    // get the biased exponent
-    exp = shift + ((1<<(expbits-1)) - 1); // shift + bias
-
-    // return the final answer
-    return (sign<<(bits-1)) | (exp<<(bits-expbits-1)) | significand;
-}
-
-static double unpack754(uint64_t i, unsigned bits, unsigned expbits)
-{
-    double result;
-    long long shift;
-    unsigned bias;
-    unsigned significandbits = bits - expbits - 1; // -1 for sign bit
-
-    if (i == 0) return 0.0;
-
-    // pull the significand
-    result = (i&((1LL<<significandbits)-1)); // mask
-    result /= (1LL<<significandbits); // convert back to double
-    result += 1.0f; // add the one back on
-
-    // deal with the exponent
-    bias = (1<<(expbits-1)) - 1;
-    shift = ((i>>significandbits)&((1LL<<expbits)-1)) - bias;
-    while(shift > 0) { result *= 2.0; shift--; }
-    while(shift < 0) { result /= 2.0; shift++; }
-
-    // sign it
-    result *= (i>>(bits-1))&1? -1.0: 1.0;
-
-    return result;
-}
-
-PackStream* packReadFile(const char* filepath)
-{
-    PackStream* result;
-
-    result = malloc(sizeof(PackStream));
-    result->fd = fopen(filepath, "rb");
-    result->write = 0;
-
-    return result;
-}
-
-PackStream* packWriteFile(const char* filepath)
-{
-    PackStream* result;
-
-    result = malloc(sizeof(PackStream));
-    result->fd = fopen(filepath, "wb");
-    result->write = 1;
-
-    return result;
-}
-
-void packCloseStream(PackStream* stream)
-{
-    if (stream->write)
-    {
-        fflush(stream->fd);
-    }
-    fclose(stream->fd);
-    free(stream);
-}
-
-void packWriteDouble(PackStream* stream, double* value)
-{
-    int written;
-    uint64_t servalue;
-
-    servalue = pack754_64(*value);
-    written = fwrite(&servalue, sizeof(uint64_t), 1, stream->fd);
-    assert(written == 1);
-}
-
-void packReadDouble(PackStream* stream, double* value)
-{
-    int read;
-    uint64_t servalue;
-
-    read = fread(&servalue, sizeof(uint64_t), 1, stream->fd);
-    assert(read == 1);
-
-    *value = unpack754_64(servalue);
-}
-
-void packWriteInt(PackStream* stream, int* value)
-{
-    int written;
-
-    written = fprintf(stream->fd, "%d;", *value);
-    assert(written > 1);
-}
-
-void packReadInt(PackStream* stream, int* value)
-{
-    int read;
-
-    read = fscanf(stream->fd, "%d;", value);
-    assert(read == 1);
-}
-
-void packWriteString(PackStream* stream, char* value, int max_length)
-{
-    int written;
-    int len = 0;
-    while (len < max_length - 1 && value[len] != '\0')
-    {
-        len++;
-    }
-    packWriteInt(stream, &len);
-    if (len > 0)
-    {
-        written = fwrite(value, 1, len, stream->fd);
-        assert(written == len);
-    }
-}
-
-void packReadString(PackStream* stream, char* value, int max_length)
-{
-    int read;
-    int len, clen;
-
-    packReadInt(stream, &len);
-
-    if (len > max_length - 1)
-    {
-        clen = max_length - 1;
-    }
-    else
-    {
-        clen = len;
-    }
-
-    if (clen > 0)
-    {
-        read = fread(value, 1, clen, stream->fd);
-        assert(read == clen);
-        value[clen] = '\0';
-
-        if (clen < len)
-        {
-            /* Read rest of the string, discarding it */
-            char* buffer = malloc(len - clen);
-            fread(buffer, 1, len - clen, stream->fd);
-            free(buffer);
-        }
-    }
-}
diff --git a/src/rendering/tools/pack.h b/src/rendering/tools/pack.h
deleted file mode 100644
index e83ceac..0000000
--- a/src/rendering/tools/pack.h
+++ /dev/null
@@ -1,27 +0,0 @@
-#ifndef _PAYSAGES_TOOLS_PACK_H_
-#define _PAYSAGES_TOOLS_PACK_H_
-
-#include "../rendering_global.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef struct PackStream PackStream;
-
-RENDERINGSHARED_EXPORT PackStream* packReadFile(const char* filepath);
-RENDERINGSHARED_EXPORT PackStream* packWriteFile(const char* filepath);
-RENDERINGSHARED_EXPORT void packCloseStream(PackStream* stream);
-
-RENDERINGSHARED_EXPORT void packWriteDouble(PackStream* stream, double* value);
-RENDERINGSHARED_EXPORT void packReadDouble(PackStream* stream, double* value);
-RENDERINGSHARED_EXPORT void packWriteInt(PackStream* stream, int* value);
-RENDERINGSHARED_EXPORT void packReadInt(PackStream* stream, int* value);
-RENDERINGSHARED_EXPORT void packWriteString(PackStream* stream, char* value, int max_length);
-RENDERINGSHARED_EXPORT void packReadString(PackStream* stream, char* value, int max_length);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
diff --git a/src/rendering/tools/texture.c b/src/rendering/tools/texture.c
index 3294a36..b80706d 100644
--- a/src/rendering/tools/texture.c
+++ b/src/rendering/tools/texture.c
@@ -1,5 +1,6 @@
 #include "texture.h"
 
+#include <stdlib.h>
 #include <assert.h>
 #include <math.h>
 #include "System.h"
diff --git a/src/rendering/tools/texture.h b/src/rendering/tools/texture.h
index 6d3a74f..5e349b0 100644
--- a/src/rendering/tools/texture.h
+++ b/src/rendering/tools/texture.h
@@ -11,7 +11,7 @@ extern "C" {
 
 #include "../rendering_global.h"
 #include "color.h"
-#include "pack.h"
+#include "PackStream.h"
 
 typedef struct Texture2D Texture2D;
 typedef struct Texture3D Texture3D;
diff --git a/src/rendering/tools/zone.h b/src/rendering/tools/zone.h
index f9c040d..43bf798 100644
--- a/src/rendering/tools/zone.h
+++ b/src/rendering/tools/zone.h
@@ -8,7 +8,7 @@
 #include "../rendering_global.h"
 #include "rendering/tools/euclid.h"
 #include "rendering/tools/curve.h"
-#include "rendering/tools/pack.h"
+#include "PackStream.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/src/system/PackStream.cpp b/src/system/PackStream.cpp
new file mode 100644
index 0000000..fe2d96f
--- /dev/null
+++ b/src/system/PackStream.cpp
@@ -0,0 +1,141 @@
+#include "PackStream.h"
+
+#include <QFile>
+#include <QDataStream>
+#include <QString>
+
+PackStream::PackStream()
+{
+    file = NULL;
+    stream = NULL;
+}
+
+PackStream::~PackStream()
+{
+    if (stream)
+    {
+        delete stream;
+    }
+    if (file)
+    {
+        delete file;
+    }
+}
+
+void PackStream::bindToFile(const char* filepath, bool write)
+{
+    if (not file and not stream)
+    {
+        file = new QFile(filepath);
+        file->open(write ? QIODevice::WriteOnly : QIODevice::ReadOnly);
+
+        stream = new QDataStream(file);
+    }
+}
+
+void PackStream::write(int* value)
+{
+    if (stream and value)
+    {
+        *stream << *value;
+    }
+}
+
+void PackStream::write(double* value)
+{
+    if (stream and value)
+    {
+        *stream << *value;
+    }
+}
+
+void PackStream::write(char* value, int max_length)
+{
+    if (stream and value)
+    {
+        int length = qstrlen(value);
+        *stream << QString::fromUtf8(value, length > max_length ? max_length : length);
+    }
+}
+
+void PackStream::read(int* value)
+{
+    if (stream and value and not stream->atEnd())
+    {
+        int output;
+        *stream >> output;
+        *value = output;
+    }
+}
+
+void PackStream::read(double* value)
+{
+    if (stream and value and not stream->atEnd())
+    {
+        double output;
+        *stream >> output;
+        *value = output;
+    }
+}
+
+void PackStream::read(char* value, int max_length)
+{
+    if (stream and value and not stream->atEnd())
+    {
+        QString output;
+        *stream >> output;
+        QByteArray array = output.toUtf8();
+        qstrncpy(value, array.constData(), max_length);
+    }
+}
+
+// Transitional C-API
+
+PackStream* packReadFile(const char* filepath)
+{
+    PackStream* result = new PackStream();
+    result->bindToFile(filepath, false);
+    return result;
+}
+
+PackStream* packWriteFile(const char* filepath)
+{
+    PackStream* result = new PackStream();
+    result->bindToFile(filepath, true);
+    return result;
+}
+
+void packCloseStream(PackStream* stream)
+{
+    delete stream;
+}
+
+void packWriteDouble(PackStream* stream, double* value)
+{
+    stream->write(value);
+}
+
+void packReadDouble(PackStream* stream, double* value)
+{
+    stream->read(value);
+}
+
+void packWriteInt(PackStream* stream, int* value)
+{
+    stream->write(value);
+}
+
+void packReadInt(PackStream* stream, int* value)
+{
+    stream->read(value);
+}
+
+void packWriteString(PackStream* stream, char* value, int max_length)
+{
+    stream->write(value, max_length);
+}
+
+void packReadString(PackStream* stream, char* value, int max_length)
+{
+    stream->read(value, max_length);
+}
diff --git a/src/system/PackStream.h b/src/system/PackStream.h
new file mode 100644
index 0000000..12b76ed
--- /dev/null
+++ b/src/system/PackStream.h
@@ -0,0 +1,67 @@
+#ifndef PACKSTREAM_H
+#define PACKSTREAM_H
+
+#include "system_global.h"
+
+#ifdef __cplusplus
+
+class QFile;
+class QDataStream;
+
+namespace paysages
+{
+namespace system
+{
+
+/*!
+ * \brief Data (de)serialization in files or streams.
+ */
+class SYSTEMSHARED_EXPORT PackStream
+{
+public:
+    PackStream();
+    ~PackStream();
+
+    void bindToFile(const char* filepath, bool write=false);
+
+    void write(int* value);
+    void write(double* value);
+    void write(char* value, int max_length);
+
+    void read(int* value);
+    void read(double* value);
+    void read(char* value, int max_length);
+
+private:
+    QFile* file;
+    QDataStream* stream;
+};
+
+}
+}
+
+extern "C" {
+#endif
+
+// Transitional C-API
+
+#ifndef __cplusplus
+typedef struct PackStream PackStream;
+#endif
+
+SYSTEMSHARED_EXPORT PackStream* packReadFile(const char* filepath);
+SYSTEMSHARED_EXPORT PackStream* packWriteFile(const char* filepath);
+SYSTEMSHARED_EXPORT void packCloseStream(PackStream* stream);
+
+SYSTEMSHARED_EXPORT void packWriteDouble(PackStream* stream, double* value);
+SYSTEMSHARED_EXPORT void packReadDouble(PackStream* stream, double* value);
+SYSTEMSHARED_EXPORT void packWriteInt(PackStream* stream, int* value);
+SYSTEMSHARED_EXPORT void packReadInt(PackStream* stream, int* value);
+SYSTEMSHARED_EXPORT void packWriteString(PackStream* stream, char* value, int max_length);
+SYSTEMSHARED_EXPORT void packReadString(PackStream* stream, char* value, int max_length);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // PACKSTREAM_H
diff --git a/src/system/system.pro b/src/system/system.pro
index 46bea97..3806695 100644
--- a/src/system/system.pro
+++ b/src/system/system.pro
@@ -16,14 +16,16 @@ SOURCES += \
     PictureFile.cpp \
     Thread.cpp \
     Mutex.cpp \
-    System.cpp
+    System.cpp \
+    PackStream.cpp
 
 HEADERS += \
     system_global.h \
     PictureFile.h \
     Thread.h \
     Mutex.h \
-    System.h
+    System.h \
+    PackStream.h
 
 unix:!symbian {
     maemo5 {
diff --git a/src/testing/test_pack.c b/src/testing/test_pack.c
index 962fbec..7799bb4 100644
--- a/src/testing/test_pack.c
+++ b/src/testing/test_pack.c
@@ -1,6 +1,6 @@
 #include "testing/common.h"
 
-#include "rendering/tools/pack.h"
+#include "PackStream.h"
 
 START_TEST(testPack)
 {
@@ -21,7 +21,7 @@ START_TEST(testPack)
         data_d = (double)i;
         packWriteDouble(stream, &data_d);
 
-        data_s = "Testing string 0123 !";
+        data_s = "Testing string 0123 (accentué) !";
         packWriteString(stream, data_s, 100);
         packWriteString(stream, data_s, 4);
         packWriteString(stream, data_s, 5);
@@ -39,7 +39,7 @@ START_TEST(testPack)
         ck_assert_double_eq(data_d, (double)i);
 
         packReadString(stream, buffer, 100);
-        ck_assert_str_eq(buffer, "Testing string 0123 !");
+        ck_assert_str_eq(buffer, "Testing string 0123 (accentué) !");
         packReadString(stream, buffer, 4);
         ck_assert_str_eq(buffer, "Tes");
         packReadString(stream, buffer, 3);
diff --git a/src/testing/testing.pro b/src/testing/testing.pro
index d7820a2..05fc92e 100644
--- a/src/testing/testing.pro
+++ b/src/testing/testing.pro
@@ -13,11 +13,6 @@ unix {
 
 INCLUDEPATH += $$PWD/..
 
-win32:CONFIG(release, debug|release): LIBS += -L$$OUT_PWD/../rendering/release/ -lpaysages_rendering
-else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../rendering/debug/ -lpaysages_rendering
-else:unix: LIBS += -L$$OUT_PWD/../rendering/ -lpaysages_rendering
-DEPENDPATH += $$PWD/../rendering
-
 SOURCES += main.c \
     test_terrain_painting.c \
     test_render.c \
@@ -37,3 +32,21 @@ else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../system/debug/ -l
 else:unix: LIBS += -L$$OUT_PWD/../system/ -lpaysages_system
 INCLUDEPATH += $$PWD/../system
 DEPENDPATH += $$PWD/../system
+
+win32:CONFIG(release, debug|release): LIBS += -L$$OUT_PWD/../basics/release/ -lpaysages_basics
+else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../basics/debug/ -lpaysages_basics
+else:unix: LIBS += -L$$OUT_PWD/../basics/ -lpaysages_basics
+INCLUDEPATH += $$PWD/../basics
+DEPENDPATH += $$PWD/../basics
+
+win32:CONFIG(release, debug|release): LIBS += -L$$OUT_PWD/../definition/release/ -lpaysages_definition
+else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../definition/debug/ -lpaysages_definition
+else:unix: LIBS += -L$$OUT_PWD/../definition/ -lpaysages_definition
+INCLUDEPATH += $$PWD/../definition
+DEPENDPATH += $$PWD/../definition
+
+win32:CONFIG(release, debug|release): LIBS += -L$$OUT_PWD/../rendering/release/ -lpaysages_rendering
+else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../rendering/debug/ -lpaysages_rendering
+else:unix: LIBS += -L$$OUT_PWD/../rendering/ -lpaysages_rendering
+INCLUDEPATH += $$PWD/../rendering
+DEPENDPATH += $$PWD/../rendering