diff --git a/libs/Daux.php b/libs/Daux.php
index 01ca449..56f02c9 100644
--- a/libs/Daux.php
+++ b/libs/Daux.php
@@ -2,6 +2,7 @@
 
 use Symfony\Component\Console\Output\NullOutput;
 use Todaymade\Daux\Tree\Builder;
+use Todaymade\Daux\Tree\Root;
 
 class Daux
 {
@@ -124,7 +125,9 @@ class Daux
 
     private function generateTree()
     {
-        $this->tree = Builder::build($this->docs_path, $this->options['ignore'], $this->getParams());
+        $this->tree = new Root($this->docs_path);
+        Builder::build($this->tree, $this->options['ignore'], $this->getParams());
+
         if (!empty($this->options['languages'])) {
             foreach ($this->options['languages'] as $key => $node) {
                 $this->tree->getEntries()[$key]->title = $node;
diff --git a/libs/Format/HTML/MarkdownPage.php b/libs/Format/HTML/MarkdownPage.php
index 5d4150c..3a43d25 100644
--- a/libs/Format/HTML/MarkdownPage.php
+++ b/libs/Format/HTML/MarkdownPage.php
@@ -11,8 +11,7 @@ class MarkdownPage extends \Todaymade\Daux\Format\Base\MarkdownPage
         if ($this->title === 'index') {
             $minimum_parent_dir_size = ($this->params['multilanguage']) ? 2 : 1;
             if (count($this->file->getParents()) >= $minimum_parent_dir_size) {
-                $parents = $this->file->getParents();
-                $this->title = end($parents)->getTitle();
+                $this->title = $this->file->getParent()->getTitle();
             } else {
                 $this->homepage = ($this->file->getName() === '_index');
                 $this->title = $this->params['title'];
diff --git a/libs/Format/HTML/Template.php b/libs/Format/HTML/Template.php
index 62712c4..ef27ab0 100644
--- a/libs/Format/HTML/Template.php
+++ b/libs/Format/HTML/Template.php
@@ -107,7 +107,7 @@ class Template
                     'href' => $base_page . $link,
                     'class' => ($current_url === $link) ? 'active' : ''
                 ];
-            } else if ($node instanceof Directory) {
+            } elseif ($node instanceof Directory) {
                 $link = ($path === '') ? $url : $path . '/' . $url;
 
                 $folder = [
diff --git a/libs/Tree/Builder.php b/libs/Tree/Builder.php
index 2e5e6e7..94713d5 100644
--- a/libs/Tree/Builder.php
+++ b/libs/Tree/Builder.php
@@ -1,5 +1,6 @@
 <?php namespace Todaymade\Daux\Tree;
 
+use Todaymade\Daux\Config;
 use Todaymade\Daux\Daux;
 use Todaymade\Daux\DauxHelper;
 
@@ -8,25 +9,19 @@ class Builder
     /**
      * Build the initial tree
      *
-     * @param string $dir
+     * @param Directory $node
      * @param array $ignore
-     * @param \Todaymade\Daux\Config $params
-     * @param array $parents
-     * @return Directory|void
+     * @param Config $params
      */
-    public static function build($dir, $ignore, $params, $parents = null)
+    public static function build($node, $ignore, Config $params)
     {
-        if (!$dh = opendir($dir)) {
+        if (!$dh = opendir($node->getPath())) {
             return;
         }
 
-        $node = new Directory($dir, $parents);
-
-        $new_parents = $parents;
-        if (is_null($new_parents)) {
-            $new_parents = array();
-        } else {
-            $new_parents[] = $node;
+        if ($node instanceof Root) {
+            // Ignore config.json in the root directory
+            $ignore['files'][] = 'config.json';
         }
 
         while (($file = readdir($dh)) !== false) {
@@ -34,7 +29,7 @@ class Builder
                 continue;
             }
 
-            $path = $dir . DS . $file;
+            $path = $node->getPath() . DS . $file;
 
             if (is_dir($path) && in_array($file, $ignore['folders'])) {
                 continue;
@@ -45,19 +40,12 @@ class Builder
 
             $entry = null;
             if (is_dir($path)) {
-                $entry = static::build($path, $ignore, $params, $new_parents);
-            } elseif (in_array(pathinfo($path, PATHINFO_EXTENSION), Daux::$VALID_MARKDOWN_EXTENSIONS)) {
-                $entry = new Content($path, $new_parents);
-
-                if ($params['mode'] === Daux::STATIC_MODE) {
-                    $entry->setUri($entry->getUri() . '.html');
-                }
+                $new = new Directory($node, static::getUriFromFilename(static::getFilename($path)), $path);
+                $new->setName(DauxHelper::pathinfo($path)['filename']);
+                $new->setTitle(static::getTitleFromFilename($new->getName()));
+                static::build($new, $ignore, $params);
             } else {
-                $entry = new Raw($path, $new_parents);
-            }
-
-            if ($entry instanceof Entry) {
-                $node->addChild($entry);
+                static::createContent($node, $path, $params);
             }
         }
 
@@ -68,7 +56,91 @@ class Builder
         } else {
             $node->setIndexPage(false);
         }
-        return $node;
+    }
+
+    /**
+     * @param Directory $parent
+     * @param string $path
+     * @param Config $params
+     * @return Content|Raw
+     */
+    public static function createContent(Directory $parent, $path, Config $params)
+    {
+        $name = DauxHelper::pathinfo($path)['filename'];
+
+        if (in_array(pathinfo($path, PATHINFO_EXTENSION), Daux::$VALID_MARKDOWN_EXTENSIONS)) {
+            $uri = static::getUriFromFilename($name);
+            if ($params['mode'] === Daux::STATIC_MODE) {
+                $uri .= '.html';
+            }
+
+            $entry = new Content($parent, $uri, $path, filemtime($path));
+        } else {
+            $entry = new Raw($parent, static::getUriFromFilename(static::getFilename($path)), $path, filemtime($path));
+        }
+
+        if ($entry->getUri() == $params['index_key']) {
+            if ($parent instanceof Root) {
+                $entry->setTitle($params['title']);
+            } else {
+                $entry->setTitle($parent->getTitle());
+            }
+        } else {
+            $entry->setTitle(static::getTitleFromFilename($name));
+        }
+
+        $entry->setIndexPage(false);
+        $entry->setName($name);
+
+        return $entry;
+    }
+
+    /**
+     * @param string $file
+     * @return string
+     */
+    protected static function getFilename($file)
+    {
+        $parts = explode('/', $file);
+        return end($parts);
+    }
+
+    /**
+     * @param string $filename
+     * @return string
+     */
+    protected static function getTitleFromFilename($filename)
+    {
+        $filename = explode('_', $filename);
+        if ($filename[0] == '' || is_numeric($filename[0])) {
+            unset($filename[0]);
+        } else {
+            $t = $filename[0];
+            if ($t[0] == '-') {
+                $filename[0] = substr($t, 1);
+            }
+        }
+        $filename = implode(' ', $filename);
+        return $filename;
+    }
+
+    /**
+     * @param string $filename
+     * @return string
+     */
+    protected static function getUriFromFilename($filename)
+    {
+        $filename = explode('_', $filename);
+        if ($filename[0] == '' || is_numeric($filename[0])) {
+            unset($filename[0]);
+        } else {
+            $t = $filename[0];
+            if ($t[0] == '-') {
+                $filename[0] = substr($t, 1);
+            }
+        }
+        $filename = implode('_', $filename);
+        return $filename;
     }
 
     /**
@@ -84,48 +156,38 @@ class Builder
             return $parent->getEntries()[$slug];
         }
 
-        $dir = new Directory();
+        $dir = new Directory($parent, $slug);
         $dir->setTitle($title);
-        $dir->setUri($slug);
-        $parent->addChild($dir);
 
         return $dir;
     }
 
     /**
-     * @param array $parents
+     * @param Directory $parent
      * @param string $title
      * @return Content
      */
-    public static function getOrCreatePage($parents, $title)
+    public static function getOrCreatePage(Directory $parent, $title)
     {
         $slug = DauxHelper::slug($title);
         $uri = $slug . ".html";
 
-        /**
-         * @var Directory $nearestParent
-         */
-        $nearestParent = end($parents);
-
-        if (array_key_exists($uri, $nearestParent->getEntries())) {
-            return $nearestParent->getEntries()[$uri];
+        if (array_key_exists($uri, $parent->getEntries())) {
+            return $parent->getEntries()[$uri];
         }
 
-        $page = new Content('', $parents);
-        $page->setUri($uri);
+        $page = new Content($parent, $uri);
         $page->setContent("-"); //set an almost empty content to avoid problems
 
         if ($title == 'index') {
             $page->setName('_index');
-            $page->setTitle($nearestParent->getTitle());
-            $nearestParent->setIndexPage($page);
+            $page->setTitle($parent->getTitle());
+            $parent->setIndexPage($page);
         } else {
             $page->setName($slug);
             $page->setTitle($title);
         }
 
-        $nearestParent->addChild($page);
-
         return $page;
     }
 }
diff --git a/libs/Tree/Directory.php b/libs/Tree/Directory.php
index 9a1694d..1ad0f1d 100644
--- a/libs/Tree/Directory.php
+++ b/libs/Tree/Directory.php
@@ -16,9 +16,6 @@ class Directory extends Entry
 
     public function addChild(Entry $entry)
     {
-        //TODO :: set parent in the entry
-        //TODO :: remove child from previous parent
-
         $this->children[$entry->getUri()] = $entry;
     }
 
@@ -71,4 +68,15 @@ class Directory extends Entry
             }
         }
     }
+
+    public function dump()
+    {
+        $dump = parent::dump();
+
+        foreach ($this->getEntries() as $entry) {
+            $dump['children'][] = $entry->dump();
+        }
+
+        return $dump;
+    }
 }
diff --git a/libs/Tree/Entry.php b/libs/Tree/Entry.php
index 15db34b..d922dc9 100644
--- a/libs/Tree/Entry.php
+++ b/libs/Tree/Entry.php
@@ -1,7 +1,5 @@
 <?php namespace Todaymade\Daux\Tree;
 
-use Todaymade\Daux\DauxHelper;
-
 abstract class Entry
 {
     /** @var string */
@@ -19,23 +17,33 @@ abstract class Entry
     /** @var string */
     protected $uri;
 
+    /** @var Directory */
+    protected $parent;
+
     /** @var string */
-    protected $local_path;
+    protected $path;
 
     /** @var integer */
     protected $last_modified;
 
-    /** @var array */
-    protected $parents;
-
     /**
+     * @param Directory $parent
+     * @param string $uri
      * @param string $path
-     * @param array $parents
+     * @param integer $last_modified
      */
-    public function __construct($path = '', $parents = array())
+    public function __construct(Directory $parent, $uri, $path = null, $last_modified = null)
     {
-        $this->setPath($path);
-        $this->setParents($parents);
+        $this->setUri($uri);
+        $this->setParent($parent);
+
+        if ($path) {
+            $this->path = $path;
+        }
+
+        if ($last_modified) {
+            $this->last_modified = $last_modified;
+        }
     }
 
     /**
@@ -67,7 +75,15 @@ abstract class Entry
      */
     public function setUri($uri)
     {
+        if ($this->parent) {
+            $this->parent->removeChild($this);
+        }
+
         $this->uri = $uri;
+
+        if ($this->parent) {
+            $this->parent->addChild($this);
+        }
     }
 
     /**
@@ -102,7 +118,7 @@ abstract class Entry
         // First we try to find a real page
         foreach ($this->getEntries() as $node) {
             if ($node instanceof Content) {
-                if (!count($node->getParents()) && $node->title == 'index') {
+                if (!$node->getParent() && $node->title == 'index') {
                     //the homepage should not count as first page
                     continue;
                 }
@@ -148,19 +164,40 @@ abstract class Entry
     }
 
     /**
-     * @return array
+     * @return Directory
      */
-    public function getParents()
+    public function getParent()
     {
-        return $this->parents;
+        return $this->parent;
     }
 
     /**
-     * @param array $parents
+     * Return all parents starting with the root
+     *
+     * @return array<Directory>
      */
-    public function setParents($parents)
+    public function getParents()
     {
-        $this->parents = $parents;
+        $parents = [];
+        if ($this->parent && !$this->parent instanceof Root) {
+            $parents = $this->parent->getParents();
+            $parents[] = $this->parent;
+        }
+
+        return $parents;
+    }
+
+    /**
+     * @param Directory $parent
+     */
+    protected function setParent(Directory $parent)
+    {
+        if ($this->parent) {
+            $this->parent->removeChild($this);
+        }
+
+        $parent->addChild($this);
+        $this->parent = $parent;
     }
 
     /**
@@ -168,23 +205,7 @@ abstract class Entry
      */
     public function getPath()
     {
-        return $this->local_path;
-    }
-
-    /**
-     * @param string $path
-     */
-    public function setPath($path)
-    {
-        if (!isset($path) || $path == '' || !file_exists($path)) {
-            return;
-        }
-        $this->local_path = $path;
-        $this->last_modified = filemtime($path);
-        $this->name = DauxHelper::pathinfo($path)['filename'];
-        $this->title = $this->getTitleInternal($this->name);
-        $this->uri = $this->getUrlInternal($this->getFilename($path));
-        $this->index_page = false;
+        return $this->path;
     }
 
     /**
@@ -193,58 +214,26 @@ abstract class Entry
     public function getUrl()
     {
         $url = '';
-        foreach ($this->parents as $node) {
-            $url .= $node->uri . '/';
+
+        if ($this->getParent() && !$this->getParent() instanceof Root) {
+            $url = $this->getParent()->getUrl() . '/' . $url;
         }
-        $url .= $this->uri;
+
+        $url .= $this->getUri();
         return $url;
     }
 
-    /**
-     * @param string $file
-     * @return string
-     */
-    protected function getFilename($file)
+    public function dump()
     {
-        $parts = explode('/', $file);
-        return end($parts);
-    }
-
-    /**
-     * @param string $filename
-     * @return string
-     */
-    protected function getTitleInternal($filename)
-    {
-        $filename = explode('_', $filename);
-        if ($filename[0] == '' || is_numeric($filename[0])) {
-            unset($filename[0]);
-        } else {
-            $t = $filename[0];
-            if ($t[0] == '-') {
-                $filename[0] = substr($t, 1);
-            }
-        }
-        $filename = implode(' ', $filename);
-        return $filename;
-    }
-
-    /**
-     * @param string $filename
-     * @return string
-     */
-    protected function getUrlInternal($filename)
-    {
-        $filename = explode('_', $filename);
-        if ($filename[0] == '' || is_numeric($filename[0])) {
-            unset($filename[0]);
-        } else {
-            $t = $filename[0];
-            if ($t[0] == '-') {
-                $filename[0] = substr($t, 1);
-            }
-        }
-        $filename = implode('_', $filename);
-        return $filename;
+        return [
+            'title' => $this->getTitle(),
+            'type' => get_class($this),
+            'name' => $this->getName(),
+            'uri' => $this->getUri(),
+            'url' => $this->getUrl(),
+            'index' => $this->getIndexPage()? $this->getIndexPage()->getUrl() : '',
+            'first' => $this->getFirstPage() ? $this->getFirstPage()->getUrl() : '',
+            'path' => $this->path
+        ];
     }
 }
diff --git a/libs/Tree/Root.php b/libs/Tree/Root.php
new file mode 100644
index 0000000..6aae9d7
--- /dev/null
+++ b/libs/Tree/Root.php
@@ -0,0 +1,15 @@
+<?php namespace Todaymade\Daux\Tree;
+
+class Root extends Directory
+{
+    /**
+     * The root doesn't have a parent
+     *
+     * @param Directory $uri
+     */
+    public function __construct($uri)
+    {
+        $this->setUri($uri);
+        $this->path = $uri;
+    }
+}