diff --git a/configuration.php b/Lib/Configuration.php
similarity index 89%
rename from configuration.php
rename to Lib/Configuration.php
index 0528b6d..75dd2b8 100644
--- a/configuration.php
+++ b/Lib/Configuration.php
@@ -1,5 +1,7 @@
 <?php
 
+namespace BSR\Lib;
+
 class Configuration {
     private static $instance = null;
 
@@ -62,7 +64,7 @@ class Configuration {
             require_once($this->custom_config);
 
             if(! isset($configuration) || ! is_array($configuration)) {
-                throw new RuntimeException("You custom configuration in '{$this->custom_config}' must be in a variable named '\$configuration' and be an array.");
+                throw new \RuntimeException("You custom configuration in '{$this->custom_config}' must be in a variable named '\$configuration' and be an array.");
             }
 
             $this->values = array_replace_recursive($this->values, $configuration);
@@ -74,7 +76,7 @@ class Configuration {
         $keys = explode('.', $key);
         foreach ($keys as $k) {
             if (!is_array($data)) {
-                throw new Exception("Try to access non-array as array, key '$key''");
+                throw new \Exception("Try to access non-array as array, key '$key''");
             }
             if (!isset($data[$k])) {
                 return $default;
diff --git a/Lib/Exception/BookNotFoundException.php b/Lib/Exception/BookNotFoundException.php
new file mode 100644
index 0000000..f8eec20
--- /dev/null
+++ b/Lib/Exception/BookNotFoundException.php
@@ -0,0 +1,9 @@
+<?php
+
+namespace BSR\Lib\Exception;
+
+class BookNotFoundException extends WebException {
+    public function __construct($code) {
+        parent::__construct('BookNotFound', "The book with code $code was not found", -404);
+    }
+}
diff --git a/Lib/Exception/InvalidAttributeException.php b/Lib/Exception/InvalidAttributeException.php
new file mode 100644
index 0000000..5598723
--- /dev/null
+++ b/Lib/Exception/InvalidAttributeException.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace BSR\Lib\Exception;
+
+/**
+ * Exception raised when an invalid attribute name is accessed
+ */
+class InvalidAttributeException extends \Exception { }
diff --git a/Lib/Exception/SqlException.php b/Lib/Exception/SqlException.php
new file mode 100644
index 0000000..9384ab4
--- /dev/null
+++ b/Lib/Exception/SqlException.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace BSR\Lib\Exception;
+
+class SqlException extends \Exception
+{
+    private $query;
+
+    public function __construct($message = "Sql Error", $query = "")
+    {
+        $this->query = $query;
+        parent::__construct($message, 0);
+    }
+
+    public function getSqlError()
+    {
+        return $this->getMessage().' while executing: '.$this->query;
+    }
+}
diff --git a/Lib/Exception/WebException.php b/Lib/Exception/WebException.php
new file mode 100644
index 0000000..7476e72
--- /dev/null
+++ b/Lib/Exception/WebException.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace BSR\Lib\Exception;
+
+class WebException extends \Exception
+{
+    private $excname;
+
+    /**
+     * @param string $name
+     * @param string $reason
+     * @param int $code
+     */
+    function __construct($name, $reason, $code)
+    {
+        $this->excname = $name;
+        parent::__construct($reason, $code);
+    }
+
+    public function getName()
+    {
+        return $this->excname;
+    }
+}
diff --git a/lib/BookSearch.php b/Lib/Search/BookSearch.php
similarity index 94%
rename from lib/BookSearch.php
rename to Lib/Search/BookSearch.php
index 80db9f7..d0d344b 100644
--- a/lib/BookSearch.php
+++ b/Lib/Search/BookSearch.php
@@ -1,5 +1,9 @@
 <?php
 
+namespace BSR\Lib\Search;
+
+use BSR\Lib\Configuration;
+
 mb_http_output('UTF-8');
 
 class BookSearch
diff --git a/mobile.webservice.php b/Lib/WebService.php
similarity index 95%
rename from mobile.webservice.php
rename to Lib/WebService.php
index c7dea92..a4a00a9 100644
--- a/mobile.webservice.php
+++ b/Lib/WebService.php
@@ -1,5 +1,9 @@
 <?php
 
+namespace BSR\Lib;
+
+use BSR\Lib\Exception\WebException;
+
 abstract class WebService
 {
     private $func = null;
@@ -37,7 +41,7 @@ abstract class WebService
             $data["error"]["name"] = $e->getName();
             $data["error"]["reason"] = $e->getMessage();
             $this->log(sprintf("Failure : [%s] %s", $e->getCode(), $e->getName()));
-        } catch (Exception $e) {
+        } catch (\Exception $e) {
             $data["unexpected error"]["message"] = $e->getMessage();
             $this->log(sprintf("Unexpected exception : %s", $e->getMessage()));
         }
@@ -74,7 +78,7 @@ abstract class WebService
             throw new WebException ("CallFunction", "'func' method not available", -3);
         }
 
-        $rm = new ReflectionMethod ($this, $this->func);
+        $rm = new \ReflectionMethod($this, $this->func);
         $nbParams = count($params);
         $nbArgsFix = $rm->getNumberOfRequiredParameters();
         $nbArgs = $rm->getNumberOfParameters();
diff --git a/lib/AudioBook.php b/Lib/db/AudioBook.php
similarity index 97%
rename from lib/AudioBook.php
rename to Lib/db/AudioBook.php
index 19a2f61..281350f 100644
--- a/lib/AudioBook.php
+++ b/Lib/db/AudioBook.php
@@ -1,6 +1,6 @@
 <?php
 
-require_once('DbMapping.php');
+namespace BSR\Lib\db;
 
 /**
  * AudioBook is mapped on a Notice from NetBiblio
diff --git a/lib/Connection.php b/Lib/db/Connection.php
similarity index 90%
rename from lib/Connection.php
rename to Lib/db/Connection.php
index 561bc04..5e2dd56 100644
--- a/lib/Connection.php
+++ b/Lib/db/Connection.php
@@ -1,5 +1,10 @@
 <?php
 
+namespace BSR\Lib\db;
+
+use BSR\Lib\Configuration;
+use BSR\Lib\Exception\SqlException;
+
 class Connection
 {
     // Internal variable to hold the connection
@@ -52,7 +57,7 @@ class Connection
     final private function __clone() {}
 }
 
-class OdbcResultSet implements Iterator, ArrayAccess
+class OdbcResultSet implements \Iterator, \ArrayAccess
 {
     public $length;
 
@@ -79,7 +84,7 @@ class OdbcResultSet implements Iterator, ArrayAccess
                         $this->results[] = $data;
                     }
                 };
-            } catch (Exception $e) {
+            } catch (\Exception $e) {
                 print($e->getMessage());
             }
 
@@ -137,7 +142,7 @@ class OdbcResultSet implements Iterator, ArrayAccess
 
     public function offsetUnset($offset)
     {
-        throw new RuntimeException("This makes no sense at all.");
+        throw new \RuntimeException("This makes no sense at all.");
     }
 
     // Iterator
diff --git a/lib/DbMapping.php b/Lib/db/DbMapping.php
similarity index 91%
rename from lib/DbMapping.php
rename to Lib/db/DbMapping.php
index 416c763..219abc8 100644
--- a/lib/DbMapping.php
+++ b/Lib/db/DbMapping.php
@@ -1,5 +1,9 @@
 <?php
 
+namespace BSR\Lib\db;
+
+use BSR\Lib\Exception\InvalidAttributeException;
+
 /**
  * Base class for mapping objects. inherit you database filled objects from here.
  *
@@ -103,7 +107,7 @@ abstract class DbMapping
      * @return DbMapping
      */
     public static function find($id) {
-        throw new RuntimeException("This method must be implemented in child classes.");
+        throw new \RuntimeException("This method must be implemented in child classes.");
     }
 
     /**
diff --git a/lib/User.php b/Lib/db/User.php
similarity index 96%
rename from lib/User.php
rename to Lib/db/User.php
index bd228ff..26a31f9 100644
--- a/lib/User.php
+++ b/Lib/db/User.php
@@ -1,6 +1,7 @@
 <?php
-require_once('DbMapping.php');
-require_once('AudioBook.php');
+
+namespace BSR\Lib\db;
+use BSR\Lib\Configuration;
 
 /**
  * User is mapped on the Useraccounts table. Contains user information : id, login, firstName, lastName, displayName.
diff --git a/mobile.netbiblio.php b/NetBiblio.php
similarity index 95%
rename from mobile.netbiblio.php
rename to NetBiblio.php
index 27e79d6..50cf652 100644
--- a/mobile.netbiblio.php
+++ b/NetBiblio.php
@@ -1,17 +1,14 @@
 <?php
 
-/*
- * Copyright Mathieu Schroeter for the BSR, 2013
- * Modif Simon Schulé pour la BSR, 2013. 2014
- * Copyright Gilles Crettenand for the BSR, 2015
- */
+namespace BSR;
 
-require_once "global.php";
-require_once "mobile.webservice.php";
-
-require_once "lib/AudioBook.php";
-require_once "lib/User.php";
-require_once "lib/BookSearch.php";
+use BSR\Lib\Configuration;
+use BSR\Lib\db\AudioBook;
+use BSR\Lib\db\Connection;
+use BSR\Lib\db\User;
+use BSR\Lib\Exception\WebException;
+use BSR\Lib\Search\BookSearch;
+use BSR\Lib\WebService;
 
 class NetBiblio extends WebService
 {
@@ -416,14 +413,14 @@ class NetBiblio extends WebService
         $bs = new BookSearch();
 
         if (isset($queryArray['queryType'])) {
-            $bs->addSortField('author', SolrQuery::ORDER_ASC);
-            $bs->addSortField('title', SolrQuery::ORDER_ASC);
+            $bs->addSortField('author', \SolrQuery::ORDER_ASC);
+            $bs->addSortField('title', \SolrQuery::ORDER_ASC);
             $bs->addSortField('producerCode');
-            $bs->addSortField('mediaType', SolrQuery::ORDER_ASC);
+            $bs->addSortField('mediaType', \SolrQuery::ORDER_ASC);
         } else {
             $bs->addSortField('availabilityDate');
-            $bs->addSortField('author', SolrQuery::ORDER_ASC);
-            $bs->addSortField('title', SolrQuery::ORDER_ASC);
+            $bs->addSortField('author', \SolrQuery::ORDER_ASC);
+            $bs->addSortField('title', \SolrQuery::ORDER_ASC);
         }
 
         if (isset($queryArray['queryText']) && strlen($queryArray['queryText']) > 0) {
@@ -443,7 +440,7 @@ class NetBiblio extends WebService
             });
             if (count($selectedGenres) > 0) {
                 $selectedGenres = array_map(function ($c) {
-                    return 'genreCode:'.SolrUtils::escapeQueryChars($c);
+                    return 'genreCode:'.\SolrUtils::escapeQueryChars($c);
                 }, $selectedGenres);
                 $bs->addQuery('('.implode(' OR ', $selectedGenres).')', null, false);
             }
@@ -516,7 +513,7 @@ class NetBiblio extends WebService
 
         try {
             $results = $s->getResults(0, $itemsByGroup);
-        } catch(SolrClientException $e) {
+        } catch(\SolrClientException $e) {
             throw new WebException ("SolrError", $e->getMessage(), -710);
         }
 
diff --git a/exceptions.php b/exceptions.php
deleted file mode 100644
index 28b9d6e..0000000
--- a/exceptions.php
+++ /dev/null
@@ -1,49 +0,0 @@
-<?php
-
-class WebException extends Exception
-{
-    private $excname;
-
-    /**
-     * @param string $name
-     * @param string $reason
-     * @param int $code
-     */
-    function __construct($name, $reason, $code)
-    {
-        $this->excname = $name;
-        parent::__construct($reason, $code);
-    }
-
-    public function getName()
-    {
-        return $this->excname;
-    }
-}
-
-class SqlException extends Exception
-{
-    private $query;
-
-    public function __construct($message = "Sql Error", $query = "")
-    {
-        $this->query = $query;
-        parent::__construct($message, 0);
-    }
-
-    public function getSqlError()
-    {
-        return $this->getMessage().' while executing: '.$this->query;
-    }
-}
-
-class BookNotFoundException extends WebException {
-    public function __construct($code) {
-        parent::__construct('BookNotFound', "The book with code $code was not found", -404);
-    }
-}
-
-/**
- * Exception raised when an invalid attribute name is accessed
- */
-class InvalidAttributeException extends Exception { }
diff --git a/global.php b/global.php
deleted file mode 100644
index 1900ebf..0000000
--- a/global.php
+++ /dev/null
@@ -1,5 +0,0 @@
-<?php
-
-require_once('exceptions.php');
-require_once('configuration.php');
-require_once('lib/Connection.php');
diff --git a/index.php b/index.php
new file mode 100644
index 0000000..de230c4
--- /dev/null
+++ b/index.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace BSR;
+
+ini_set('display_errors', 'On');
+
+// register an autoloader to automatically load classes
+// the namespace for the class must begin with BSR and
+// otherwise respect the PSR-4 standard
+spl_autoload_register(function ($class) {
+    $class = substr($class, strlen('BSR'));
+    $path = sprintf('%s/%s.php', __DIR__, str_replace('\\', '/', $class));
+
+    if (file_exists($path)) {
+        require $path;
+    }
+});
+
+$web = new NetBiblio();
+$web->Run();
diff --git a/mobile.php b/mobile.php
index f8a5a0a..a600d04 100644
--- a/mobile.php
+++ b/mobile.php
@@ -1,6 +1,4 @@
 <?php
 
-require_once "mobile.netbiblio.php";
-
-$web = new NetBiblio();
-$web->Run();
+// this file is here for compatibility purpose, do not delete
+require_once('index.php');
\ No newline at end of file