diff --git a/src/Parser/ItemParser.php b/src/Parser/ItemParser.php
index 0c311ba..e401910 100644
--- a/src/Parser/ItemParser.php
+++ b/src/Parser/ItemParser.php
@@ -3,12 +3,8 @@
 namespace Shikiryu\SRSS\Parser;
 
 use DOMDocument;
-use DOMElement;
-use DOMException;
 use DOMNode;
 use Shikiryu\SRSS\Entity\Item;
-use Shikiryu\SRSS\Exception\SRSSException;
-use Shikiryu\SRSS\SRSSTools;
 
 /**
  * @property string|null $description
@@ -17,17 +13,6 @@ class ItemParser extends DomDocument
 {
 
     protected DOMNode $node; // item node
-    protected $attr; // item's properties
-
-    /**
-     * Constructor
-     *
-     * @param DomNode $node
-     */
-    public function __construct($node = null)
-    {
-        parent::__construct();
-    }
 
     /**
      * @param Item $item
@@ -84,103 +69,4 @@ class ItemParser extends DomDocument
 
         return $item;
     }
-
-    /**
-     * getter of item DomElement
-     */
-    public function getItem(): ?DOMNode
-    {
-        $this->appendChild($this->node);
-
-        return $this->getElementsByTagName('item')->item(0);
-    }
-
-    /**
-     * check if current item is valid (following specifications)
-     * @return bool
-     */
-    public function isValid(): bool
-    {
-        return $this->description != null;
-    }
-
-    /**
-     * @param $name
-     *
-     * @return bool
-     */
-    public function __isset($name)
-    {
-        return isset($this->attr[$name]);
-    }
-
-    /**
-     * main setter for properties
-     *
-     * @param $name
-     * @param $val
-     *
-     * @throws SRSSException|DOMException
-     */
-    public function __set($name, $val)
-    {
-        if (!array_key_exists($name, $this->possibilities)) {
-            throw new SRSSException(sprintf('%s is not a possible item (%s)', $name, implode(', ', array_keys($this->possibilities))));
-        }
-
-        $flag = $this->possibilities[$name];
-        if ($flag !== '') {
-            $val = SRSSTools::check($val, $flag);
-        }
-        if (!empty($val)) {
-            if ($val instanceof DOMElement) {
-                $this->node->appendChild($val);
-            } elseif ($this->$name === null) {
-                $this->node->appendChild(new DomElement($name, $val));
-            }
-            $this->attr[$name] = $val;
-        }
-    }
-
-    /**
-     * main getter for properties
-     *
-     * @param $name
-     *
-     * @return null|string
-     * @throws SRSSException
-     */
-    public function __get($name)
-    {
-        if (isset($this->attr[$name])) {
-            return $this->attr[$name];
-        }
-
-        if (array_key_exists($name, $this->possibilities)) {
-
-            $tmp = $this->node->getElementsByTagName($name);
-
-            if ($tmp->length !== 1) {
-                return null;
-            }
-
-            return $tmp->item(0)->nodeValue;
-        }
-
-        throw new SRSSException(sprintf('%s is not a possible item (%s)', $name, implode(', ', array_keys($this->possibilities))));
-    }
-
-    /**
-     * transform current item's object into an array
-     * @return array
-     */
-    public function toArray(): array
-    {
-        $infos = [];
-        foreach ($this->attr as $attrName => $attrVal) {
-            $infos[$attrName] = $attrVal;
-        }
-
-        return $infos;
-    }
 }
\ No newline at end of file
diff --git a/src/SRSS.php b/src/SRSS.php
index 4920aba..37d6213 100644
--- a/src/SRSS.php
+++ b/src/SRSS.php
@@ -15,6 +15,7 @@ use Shikiryu\SRSS\Exception\PropertyNotFoundException;
 use Shikiryu\SRSS\Exception\SRSSException;
 use Shikiryu\SRSS\Exception\UnreadableRSSException;
 use Shikiryu\SRSS\Parser\SRSSParser;
+use Shikiryu\SRSS\Validator\Validator;
 
 /**
  * @property null|string $title
@@ -124,10 +125,9 @@ class SRSS implements Iterator
         if (!property_exists(Channel::class, $name)) {
             throw new PropertyNotFoundException(Channel::class, $name);
         }
-        // TODO add validator ?
-//        if ((new Validator())->isPropertyValid($this->channel, $name)) {
+        if ((new Validator())->isValidValueForObjectProperty($this->channel, $name, $val)) {
             $this->channel->{$name} = $val;
-//        }
+        }
     }
 
     /**
diff --git a/src/SRSSTools.php b/src/SRSSTools.php
index b83d714..2f038c3 100644
--- a/src/SRSSTools.php
+++ b/src/SRSSTools.php
@@ -7,7 +7,7 @@ use DateTimeInterface;
 
 class SRSSTools
 {
-    /*public static function check($check, $flag)
+    public static function check($check, $flag)
     {
         return match ($flag) {
             'nohtml' => self::noHTML($check),
@@ -18,13 +18,12 @@ class SRSSTools
             'int' => self::checkInt($check),
             'hour' => self::checkHour($check),
             'day' => self::checkDay($check),
-            'folder' => [],
             'media_type' => self::checkMediaType($check),
             'media_medium' => self::checkMediaMedium($check),
             'bool' => self::checkBool($check),
             'medium_expression' => self::checkMediumExpression($check)
         };
-    }*/
+    }
 
     /**
      * format the RSS to the wanted format
@@ -90,11 +89,10 @@ class SRSSTools
      * @param $check string to format
      *
      * @return string formatted string
-     * TODO CDATA ?
      */
     public static function HTML4XML(string $check): string
     {
-        return htmlspecialchars($check);
+        return sprintf('<![CDATA[ %s ]]>', htmlspecialchars($check));
     }
 
     /**
diff --git a/src/Validator/Validator.php b/src/Validator/Validator.php
index 92358fa..da63052 100644
--- a/src/Validator/Validator.php
+++ b/src/Validator/Validator.php
@@ -12,31 +12,74 @@ use Shikiryu\SRSS\Entity\Media\Content;
 class Validator
 {
     protected ?object $object = null;
+
+
     /**
+     * @param $object
+     * @param $property
+     * @return ReflectionProperty|null
      * @throws ReflectionException
      */
-    public function isPropertyValid($object, $property): bool
+    private function getReflectedProperty($object, $property): ?ReflectionProperty
     {
-        $properties = array_filter($this->_getClassProperties(get_class($object)), static fn($p) => $p->getName() === $property);
+        $properties = array_filter(
+            $this->_getClassProperties(get_class($object)),
+            static fn($p) => $p->getName() === $property
+        );
+
         if (count($properties) !== 1) {
-            return false;
+            return null;
         }
 
-        $properties = current($properties);
-        $propertyValue = $object->{$properties->name};
-        $propertyAnnotations = $this->_getPropertyAnnotations($properties);
+        return current($properties);
+    }
 
-        if (empty($propertyValue) && !in_array('required', $propertyAnnotations, true)) {
+    /**
+     * @param $object
+     * @param $property
+     * @param $value
+     * @return bool
+     */
+    public function isValidValueForObjectProperty($object, $property, $value): bool
+    {
+        try {
+            $property = $this->getReflectedProperty($object, $property);
+        } catch (ReflectionException) {
+            return false;
+        }
+        $propertyAnnotations = $this->_getPropertyAnnotations($property);
+
+        if (empty($value) && !in_array('required', $propertyAnnotations, true)) {
             return true;
         }
 
         foreach ($propertyAnnotations as $propertyAnnotation) {
             $annotation = explode(' ', $propertyAnnotation);
 
-            $object->validated[$properties->name] = $this->_validateProperty($annotation, $propertyValue);
+            $object->validated[$property->name] = $this->_validateProperty($annotation, $value);
         }
 
-        return false;
+        return count(array_filter($object->validated, static fn($v) => ($v !== null && $v === false))) === 0;
+    }
+
+    /**
+     * @param $object
+     * @param $property
+     * @return bool
+     * @throws ReflectionException
+     */
+    private function objectHasProperty($object, $property): bool
+    {
+        return $this->getReflectedProperty($object, $property) instanceof ReflectionProperty;
+    }
+
+    /**
+     * @throws ReflectionException
+     */
+    public function isPropertyValid($object, $property): bool
+    {
+        return $this->objectHasProperty($object, $property) &&
+            $this->isValidValueForObjectProperty($object, $property, $object->{$property});
     }
 
     /**
@@ -65,7 +108,6 @@ class Validator
 
         foreach ($properties as $property) {
             $propertyValue = $object->{$property['name']};
-//            $propertyAnnotations = $this->_getPropertyAnnotations($property, get_class($object));
 
             if (empty($propertyValue) && !in_array('required', $property['rules'], true)) {
                 continue;
diff --git a/tests/BasicBuilderTest.php b/tests/BasicBuilderTest.php
index 2297453..9a84ddd 100644
--- a/tests/BasicBuilderTest.php
+++ b/tests/BasicBuilderTest.php
@@ -18,10 +18,13 @@ class BasicBuilderTest extends TestCase
     }
     public function testCreateBasicRSS(): void
     {
+        $title = 'My Blog';
+        $description = 'is the best';
+        $link = 'http://shikiryu.com/devblog/';
         $srss = SRSS::create();
-        $srss->title = 'My Blog';
-        $srss->description = 'is the best';
-        $srss->link = 'http://shikiryu.com/devblog/';
+        $srss->title = $title;
+        $srss->description = $description;
+        $srss->link = $link;
         $items = [
             ['title' => 'title 1', 'link' => 'http://shikiryu.com/devblog/article-1', 'pubDate' => SRSSTools::getRSSDate('2012-03-05 12:02:01'), 'description' => 'description 1'],
             ['title' => 'title 2', 'link' => 'http://shikiryu.com/devblog/article-2', 'pubDate' => SRSSTools::getRSSDate('2022-03-05 22:02:02'), 'description' => 'description 2'],
@@ -39,6 +42,10 @@ class BasicBuilderTest extends TestCase
 
         self::assertTrue($srss->isValid());
 
+        self::assertEquals($title, $srss->title);
+        self::assertEquals($description, $srss->description);
+        self::assertEquals($link, $srss->link);
+
         $builder = new SRSSBuilder();
         $builder->build($srss, $this->saved);