diff --git a/composer.json b/composer.json
index dc32b9e..ec01fc3 100644
--- a/composer.json
+++ b/composer.json
@@ -12,11 +12,12 @@
             "email": "will.knauss@gmail.com"
         }
     ],
-    "autoload": {
-        "classmap": [
-            ".",
-            "./extensions"
-        ]
+    "autoload":{
+        "psr-4":{
+            "ParseCsv\\": "src",
+            "ParseCsv\\extensions\\": "src\\extensions",
+            "ParseCsv\\tests\\": "tests"
+        }
     },
     "require-dev": {
         "phpunit/phpunit": "4.1.*"
diff --git a/examples/basic.php b/examples/basic.php
index 5744525..beec5cb 100644
--- a/examples/basic.php
+++ b/examples/basic.php
@@ -3,11 +3,11 @@
 
 
 # include parseCSV class.
-require_once('../parsecsv.lib.php');
+use ParseCsv\Csv;
 
 
 # create new parseCSV object.
-$csv = new parseCSV();
+$csv = new Csv();
 
 
 # Parse '_books.csv' using automatic delimiter detection...
diff --git a/examples/conditions.php b/examples/conditions.php
index c778b1d..c806428 100644
--- a/examples/conditions.php
+++ b/examples/conditions.php
@@ -3,11 +3,11 @@
 
 
 # include parseCSV class.
-require_once('../parsecsv.lib.php');
+use ParseCsv\Csv;
 
 
 # create new parseCSV object.
-$csv = new parseCSV();
+$csv = new Csv();
 
 
 # Example conditions:
diff --git a/examples/download.php b/examples/download.php
index bc4177f..19b46e1 100644
--- a/examples/download.php
+++ b/examples/download.php
@@ -2,11 +2,11 @@
 
 
 # include parseCSV class.
-require_once('../parsecsv.lib.php');
+use ParseCsv\Csv;
 
 
 # create new parseCSV object.
-$csv = new parseCSV();
+$csv = new Csv();
 
 
 # Parse '_books.csv' using automatic delimiter detection...
@@ -31,4 +31,4 @@ $csv->output('books.csv');
 # or is set to null, output will only return the generated CSV
 # output data, and will not output to the browser itself.
 
-?>
\ No newline at end of file
+?>
diff --git a/examples/limit.php b/examples/limit.php
index a018f59..d0635b3 100644
--- a/examples/limit.php
+++ b/examples/limit.php
@@ -3,11 +3,11 @@
 
 
 # include parseCSV class.
-require_once('../parsecsv.lib.php');
+use ParseCsv\Csv;
 
 
 # create new parseCSV object.
-$csv = new parseCSV();
+$csv = new Csv();
 
 
 # if sorting is enabled, the whole CSV file
diff --git a/parsecsv.lib.php b/src/Csv.php
similarity index 99%
rename from parsecsv.lib.php
rename to src/Csv.php
index abf343e..74381e4 100644
--- a/parsecsv.lib.php
+++ b/src/Csv.php
@@ -1,6 +1,9 @@
 <?php
+namespace ParseCsv;
 
-class parseCSV {
+use ParseCsv\extensions\DatatypeTrait;
+
+class Csv {
 
     /*
     Class: parseCSV v0.4.3 beta
diff --git a/src/enums/DatatypeEnum.php b/src/enums/DatatypeEnum.php
new file mode 100644
index 0000000..45c7f5d
--- /dev/null
+++ b/src/enums/DatatypeEnum.php
@@ -0,0 +1,117 @@
+<?php
+namespace ParseCsv\enums;
+
+/**
+ * Class DatatypeEnum
+ *
+ * @package ParseCsv\enums
+ *
+ * todo: needs a basic parent enum class for error handling.
+ */
+class DatatypeEnum
+{
+
+    const __DEFAULT = self::TYPE_STRING;
+
+    const TYPE_STRING = 'string';
+
+    const TYPE_FLOAT = 'float';
+
+    const TYPE_INT = 'integer';
+
+    const TYPE_BOOL = 'boolean';
+
+    const TYPE_DATE = 'date';
+
+    const REGEX_FLOAT = '/(^[+-]?$)|(^[+-]?[0-9]+([,.][0-9])?[0-9]*(e[+-]?[0-9]+)?$)/';
+
+    const REGEX_INT = '/^[-+]?[0-9]\d*$/';
+
+    const REGEX_BOOL = '/^(?i:true|false)$/';
+
+    /**
+     * Define validator functions here.
+     *
+     * @var array
+     */
+    private static $validators = array(
+        self::TYPE_STRING => null,
+        self::TYPE_INT => 'isValidInteger',
+        self::TYPE_BOOL => 'isValidBoolean',
+        self::TYPE_FLOAT => 'isValidFloat',
+        self::TYPE_DATE => 'isValidDate'
+    );
+
+    /**
+     * Checks data type for given string.
+     *
+     * @param string $value
+     *
+     * @return bool|string
+     */
+    public static function getValidTypeFromSample($value){
+        $value = trim((string) $value);
+
+        if (empty($value)){
+            return false;
+        }
+
+        foreach (self::$validators as $type => $validator){
+            if ($validator === null){
+                continue;
+            }
+
+            if (method_exists(__CLASS__, $validator)){
+                if (get_class()::$validator($value)) {
+                    return $type;
+                }
+            }
+
+            return self::__DEFAULT;
+        }
+    }
+
+    /**
+     * Check if string is float value.
+     *
+     * @param string $value
+     *
+     * @return bool
+     */
+    private static function isValidFloat($value) {
+        return (bool) preg_match(self::REGEX_FLOAT, $value);
+    }
+
+    /**
+     * Check if string is integer value.
+     *
+     * @param string $value
+     *
+     * @return bool
+     */
+    private static function isValidInteger($value) {
+        return (bool) preg_match(self::REGEX_INT, $value);
+    }
+
+    /**
+     * Check if string is boolean.
+     *
+     * @param string $value
+     *
+     * @return bool
+     */
+    private static function isValidBoolean($value) {
+        return (bool) preg_match(self::REGEX_BOOL, $value);
+    }
+
+    /**
+     * Check if string is date.
+     *
+     * @param string $value
+     *
+     * @return bool
+     */
+    private static function isValidDate($value) {
+        return (bool) strtotime($value);
+    }
+}
diff --git a/extensions/DatatypeTrait.php b/src/extensions/DatatypeTrait.php
similarity index 53%
rename from extensions/DatatypeTrait.php
rename to src/extensions/DatatypeTrait.php
index 6a242b1..6ffd9e2 100644
--- a/extensions/DatatypeTrait.php
+++ b/src/extensions/DatatypeTrait.php
@@ -1,4 +1,5 @@
 <?php
+namespace ParseCsv\extensions;
 
 trait DatatypeTrait {
 
@@ -11,42 +12,6 @@ trait DatatypeTrait {
      */
     public $data_types = [];
 
-    /**
-     * Check data type
-     * Check for possible data types for one field value string.
-     *
-     * @access private
-     *
-     * @param string $value cell value
-     *
-     * @return string
-     */
-    private function getDatatypeFromString($value) {
-        $value = trim((string) $value);
-
-        if (empty($value)) {
-            return 'unknown';
-        }
-
-        if (preg_match('/^(?i:true|false)$/', $value)) {
-            return 'boolean';
-        }
-
-        if (preg_match('/^[-+]?[0-9]\d*$/', $value)) {
-            return 'integer';
-        }
-
-        if (preg_match('/^[+-]?([0-9]*[.])?([0-9]|[.][0-9])+$/', $value)) {
-            return 'float';
-        }
-
-        if ((bool) strtotime($value)) {
-            return 'date';
-        }
-
-        return 'string';
-    }
-
     /**
      * Check data type for one column.
      * Check for most commonly data type for one column.
@@ -58,9 +23,15 @@ trait DatatypeTrait {
      * @return string|false
      */
     private function getMostFrequentDataypeForColumn($datatypes) {
-        unset($datatypes['unknown']);
+        array_filter($datatypes);     
 
-        $typesFreq = array_count_values($datatypes);
+        // workaround because array_count_values($datatypes) does not work anymore :-(
+        foreach ($datatypes as $type) {
+            $ids = array_keys($datatypes, $type);
+            $typesFreq[$type] = count($ids);
+
+            $datatypes = array_diff_key($datatypes, array_flip($ids));
+        }
         arsort($typesFreq);
         reset($typesFreq);
 
@@ -74,23 +45,29 @@ trait DatatypeTrait {
      *
      * @access public
      *
+     * @uses getDatatypeFromString
+     *
      * @return array|bool
      */
     public function getDatatypes() {
         if (empty($this->data)) {
             $this->data = $this->parse_string();
         }
+        if (!is_array($this->data)) {
+            throw new \Exception('No data set yet.');
+        }
 
         $result = [];
         foreach ($this->titles as $cName) {
             $column = array_column($this->data, $cName);
-            $cDatatypes = array_map([$this, 'getDatatypeFromString'], $column);
+
+            $cDatatypes = array_map('ParseCsv\enums\DatatypeEnum::getValidTypeFromSample', $column);
 
             $result[$cName] = $this->getMostFrequentDataypeForColumn($cDatatypes);
         }
 
         $this->data_types = $result;
 
-        return !empty($this->data_types) ? $this->data_types : false;
+        return !empty($this->data_types) ? $this->data_types : [];
     }
 }
diff --git a/tests/Bootstrap.php b/tests/Bootstrap.php
index 64ff13b..797e5b4 100644
--- a/tests/Bootstrap.php
+++ b/tests/Bootstrap.php
@@ -1,22 +1,13 @@
 <?php
+chdir(__DIR__ . '/..');
+if (!file_exists('vendor/autoload.php')) {
+    `composer dump-autoload`;
+}
 
-$dir = realpath(__DIR__);
-defined('BASE') OR define('BASE', dirname($dir) . '/');
-
-recursivelyIncludeFiles(BASE . 'extensions');
-
-require_once BASE . 'parsecsv.lib.php';
+require __DIR__ . '/../vendor/autoload.php';
 
 if (!class_exists('PHPUnit\Framework\TestCase')) {
     // we run on an older PHPUnit version without namespaces.
     require_once __DIR__ . '/PHPUnit_Framework_TestCase.inc.php';
 }
 
-function recursivelyIncludeFiles($pathName){
-    $dirIterator = new RecursiveDirectoryIterator($pathName);
-    foreach ($dirIterator as $dir) {
-        if ($dir->isFile() && $dir->getExtension() === 'php') {
-            require_once $dir->getPathname();
-        }
-    }
-}
diff --git a/tests/methods/ConstructTest.php b/tests/methods/ConstructTest.php
index 0a3c310..a170310 100644
--- a/tests/methods/ConstructTest.php
+++ b/tests/methods/ConstructTest.php
@@ -1,13 +1,18 @@
 <?php
+namespace ParseCsv\tests\methods;
 
-class ConstructTest extends PHPUnit\Framework\TestCase {
+use ParseCsv\Csv;
+use PHPUnit\Framework\TestCase;
+
+class ConstructTest extends TestCase
+{
 
     /**
      * CSV
-     * The parseCSV object
+     * The Csv object
      *
      * @access protected
-     * @var [parseCSV]
+     * @var [Csv]
      */
     protected $csv = null;
 
@@ -19,7 +24,7 @@ class ConstructTest extends PHPUnit\Framework\TestCase {
      */
     public function setUp() {
         //setup parse CSV
-        #$this->csv = new parseCSV();
+        #$this->csv = new Csv();
     }
 
     /**
@@ -34,35 +39,35 @@ class ConstructTest extends PHPUnit\Framework\TestCase {
 
     public function test_offset_param() {
         $offset = 10;
-        $this->csv = new parseCSV(null, $offset);
+        $this->csv = new Csv(null, $offset);
         $this->assertTrue(is_numeric($this->csv->offset));
         $this->assertEquals($offset, $this->csv->offset);
     }
 
     public function test_limit_param() {
         $limit = 10;
-        $this->csv = new parseCSV(null, null, $limit);
+        $this->csv = new Csv(null, null, $limit);
         $this->assertTrue(is_numeric($this->csv->limit));
         $this->assertEquals($limit, $this->csv->limit);
     }
 
     public function test_conditions_param() {
         $conditions = 'some column NOT value';
-        $this->csv = new parseCSV(null, null, null, $conditions);
+        $this->csv = new Csv(null, null, null, $conditions);
         $this->assertTrue(is_string($this->csv->conditions));
         $this->assertEquals($conditions, $this->csv->conditions);
     }
 
     public function test_keep_file_data_param() {
         $keep = true;
-        $this->csv = new parseCSV(null, null, null, null, $keep);
+        $this->csv = new Csv(null, null, null, null, $keep);
         $this->assertTrue(is_bool($this->csv->keep_file_data));
         $this->assertEquals($keep, $this->csv->keep_file_data);
     }
 
     public function test_input_param() {
         $csv = "col1,col2,col3\r\nval1,val2,val3\r\nval1A,val2A,val3A\r\n";
-        $this->csv = new parseCSV($csv, null, null, null, true);
+        $this->csv = new Csv($csv, null, null, null, true);
         $this->assertTrue(is_string($this->csv->file_data));
         $this->assertEquals($csv, $this->csv->file_data);
     }
diff --git a/tests/methods/ParseTest.php b/tests/methods/ParseTest.php
index 291f81e..2ea3f2e 100644
--- a/tests/methods/ParseTest.php
+++ b/tests/methods/ParseTest.php
@@ -1,13 +1,18 @@
 <?php
+namespace ParseCsv\tests\methods;
 
-class ParseTest extends PHPUnit\Framework\TestCase {
+use ParseCsv\Csv;
+use PHPUnit_Framework_TestCase as TestCase;
+
+class ParseTest extends TestCase
+{
 
     /**
      * CSV
-     * The parseCSV object
+     * The CSV object
      *
      * @access protected
-     * @var parseCSV
+     * @var Csv
      */
     protected $csv;
 
@@ -18,7 +23,7 @@ class ParseTest extends PHPUnit\Framework\TestCase {
      * @access public
      */
     public function setUp() {
-        $this->csv = new parseCSV();
+        $this->csv = new Csv();
     }
 
     public function test_parse() {
@@ -132,7 +137,7 @@ class ParseTest extends PHPUnit\Framework\TestCase {
      * @depends testSepRowAutoDetection
      */
     public function testGetColumnDatatypes() {
-        $this->csv->auto('tests/methods/fixtures/datatype.csv');
+        $this->csv->auto(__DIR__ . '/fixtures/datatype.csv');
         $this->csv->getDatatypes();
         $expected = [
             'title' => 'string',
@@ -182,7 +187,7 @@ class ParseTest extends PHPUnit\Framework\TestCase {
      * @param string $enclosure
      */
     public function testAutoQuotes($file, $enclosure) {
-        $csv = new parseCSV();
+        $csv = new Csv();
         $csv->auto($file, true, null, null, $enclosure);
         $this->assertArrayHasKey('column1', $csv->data[0], 'Data parsed incorrectly with enclosure ' . $enclosure);
         $this->assertEquals('value1', $csv->data[0]['column1'], 'Data parsed incorrectly with enclosure ' . $enclosure);
diff --git a/tests/methods/SaveTest.php b/tests/methods/SaveTest.php
index de66395..0918b69 100644
--- a/tests/methods/SaveTest.php
+++ b/tests/methods/SaveTest.php
@@ -1,8 +1,13 @@
 <?php
+namespace ParseCsv\tests\methods;
 
-class SaveTest extends PHPUnit\Framework\TestCase {
+use ParseCsv\Csv;
+use PHPUnit_Framework_TestCase as TestCase;
 
-    /** @var parseCSV */
+class SaveTest extends TestCase
+{
+
+    /** @var Csv */
     private $csv;
 
     private $temp_filename;
@@ -11,7 +16,7 @@ class SaveTest extends PHPUnit\Framework\TestCase {
      * Setup our test environment objects; will be called before each test.
      */
     public function setUp() {
-        $this->csv = new parseCSV();
+        $this->csv = new Csv();
         $this->csv->auto(__DIR__ . '/../example_files/single_column.csv');
 
         // Remove last 2 lines to simplify comparison
diff --git a/tests/methods/fixtures/datatype.csv b/tests/methods/fixtures/datatype.csv
index ef367b0..83e6019 100644
--- a/tests/methods/fixtures/datatype.csv
+++ b/tests/methods/fixtures/datatype.csv
@@ -1,5 +1,5 @@
 sep=;
-title;isbn;publishedAt;published;count;price;
+title;isbn;publishedAt;published;count;price
 Красивая кулинария;5454-5587-3210;21.05.2011;true;1;10.99
 The Wine Connoisseurs;2547-8548-2541;12.12.2011;TRUE;;20,33
 Weißwein;1313-4545-8875;23.02.2012;false;10;10
diff --git a/tests/properties/default_values_test.php b/tests/properties/default_values_test.php
index 2117094..ab803b9 100644
--- a/tests/properties/default_values_test.php
+++ b/tests/properties/default_values_test.php
@@ -1,13 +1,17 @@
 <?php
+namespace ParseCsv\tests\properties;
 
-class default_values_properties_Test extends PHPUnit\Framework\TestCase {
+use ParseCsv\Csv;
+use PHPUnit_Framework_TestCase as TestCase;
+
+class default_values_properties_Test extends TestCase {
 
     /**
      * CSV
      * The parseCSV object
      *
      * @access protected
-     * @var [parseCSV]
+     * @var Csv
      */
     protected $csv = null;
 
@@ -19,7 +23,7 @@ class default_values_properties_Test extends PHPUnit\Framework\TestCase {
      */
     public function setUp() {
         //setup parse CSV
-        $this->csv = new parseCSV();
+        $this->csv = new Csv();
     }
 
     /**
diff --git a/tests/properties/worthless_test.php b/tests/properties/worthless_test.php
index 5459b59..c41c8df 100644
--- a/tests/properties/worthless_test.php
+++ b/tests/properties/worthless_test.php
@@ -1,13 +1,17 @@
 <?php
+namespace ParseCsv\tests\properties;
 
-class worthless_properties_Test extends PHPUnit\Framework\TestCase {
+use ParseCsv\Csv;
+use PHPUnit_Framework_TestCase as TestCase;
+
+class DefaultValuesTest extends TestCase {
 
     /**
      * CSV
      * The parseCSV object
      *
      * @access protected
-     * @var [parseCSV]
+     * @var Csv
      */
     protected $csv = null;
 
@@ -16,7 +20,7 @@ class worthless_properties_Test extends PHPUnit\Framework\TestCase {
      * The reflection class object
      *
      * @access protected
-     * @var [ReflectionClass]
+     * @var \ReflectionClass
      */
     protected $reflection = null;
 
@@ -24,6 +28,7 @@ class worthless_properties_Test extends PHPUnit\Framework\TestCase {
      * Reflection Properties
      * The reflected class properties
      *
+     * @var \ReflectionProperty[]
      * @access protected
      */
     protected $properties = null;
@@ -36,10 +41,10 @@ class worthless_properties_Test extends PHPUnit\Framework\TestCase {
      */
     public function setUp() {
         //setup parse CSV
-        $this->csv = new parseCSV();
+        $this->csv = new Csv();
 
         //setup the reflection class
-        $this->reflection = new ReflectionClass($this->csv);
+        $this->reflection = new \ReflectionClass($this->csv);
 
         //setup the reflected class properties
         $this->properties = $this->reflection->getProperties();
@@ -65,7 +70,7 @@ class worthless_properties_Test extends PHPUnit\Framework\TestCase {
      * @access public
      */
     public function test_propertiesCount() {
-        $this->assertCount(28, $this->properties);
+        $this->assertCount(29, $this->properties);
     }
 
     /**
@@ -112,7 +117,7 @@ class worthless_properties_Test extends PHPUnit\Framework\TestCase {
         );
 
         // Find our real properties
-        $real_properties = array_map(function (ReflectionProperty $property) {
+        $real_properties = array_map(function (\ReflectionProperty $property) {
             return $property->getName();
         }, $this->properties);