diff --git a/src/Entity.php b/src/Entity.php
index c3ddfc1..c4d2876 100644
--- a/src/Entity.php
+++ b/src/Entity.php
@@ -60,7 +60,20 @@ public function __unset($name)
 
     public function validate() : bool
     {
-        $validation = (new Validator())->schemaValidation($this->data, $this->model->getSchema());
+        return $this->validateData($this->data, $this->model->getSchema());
+    }
+
+    public function validatePartially(array $requiredFields) : bool
+    {
+        $model = $this->model->getModel();
+        $model->required = $requiredFields;
+        $schema = $this->model->getSchema($model);
+        return $this->validateData($this->data, $schema);
+    }
+
+    private function validateData($data, $schema) : bool
+    {
+        $validation = (new Validator())->schemaValidation($data, $schema);
         if (!$validation->isValid()) {
             $errors = $validation->getErrors();
             $message = 'Data validation failed.' . PHP_EOL;
@@ -78,6 +91,7 @@ public function validate() : bool
         return true;
     }
 
+
     public function equals($rightHandedObject) : bool
     {
         return (string) $this === (string) $rightHandedObject;
@@ -104,6 +118,6 @@ public static function createFromJsonFile($filePath) : Entity
 
     public static function createFromJson($json) : Entity
     {
-        return new static(new Model($json));
+        return new self(new Model($json));
     }
 }
diff --git a/src/Model.php b/src/Model.php
index 4cf5eb2..1c58a22 100644
--- a/src/Model.php
+++ b/src/Model.php
@@ -8,23 +8,39 @@
 
 final class Model
 {
-    private $schema;
+    private $model;
+    private $requiredFields;
 
     public function __construct(string $jsonSchema)
     {
-        $this->schema = Schema::fromJsonString($jsonSchema);
+        $this->model = json_decode($jsonSchema);
+        if (json_last_error() === JSON_ERROR_NONE) {
+            $this->requiredFields = $this->model->required;
+        }
     }
 
-    public function getSchema()  : Schema
+    public function getModel() : \stdClass
+    {
+        return $this->model;
+    }
+    public function getRequiredFields() : array
     {
-        return $this->schema;
+        return $this->requiredFields;
+    }
+
+    public function getSchema(?\stdClass $model = null)  : Schema
+    {
+        if ($model !== null) {
+            return new Schema($model);
+        }
+        return new Schema($this->model);
     }
 
-    public static function fromJsonFile(string $filePath) : Model
+    public static function createFromJsonFile(string $filePath) : Model
     {
         if (!file_exists($filePath)) {
             throw new UnexpectedValueException(sprintf('Model definition file (%s) does not exist!', $filePath));
         }
-        return new static(file_get_contents($filePath));
+        return new self(file_get_contents($filePath));
     }
 }
diff --git a/tests/resources/test-schema-invalid-json.json b/tests/resources/test-schema-invalid-json.json
index 5f7b8ef..363faf7 100644
--- a/tests/resources/test-schema-invalid-json.json
+++ b/tests/resources/test-schema-invalid-json.json
@@ -1 +1,4 @@
-{"test": }
\ No newline at end of file
+{
+  "required": ["id"],
+  "test":
+}
\ No newline at end of file
diff --git a/tests/unit/EntityTest.php b/tests/unit/EntityTest.php
index 43de87b..4cba7d7 100644
--- a/tests/unit/EntityTest.php
+++ b/tests/unit/EntityTest.php
@@ -47,6 +47,20 @@ public function shouldReturnEntityObjectSuccessfully() : void
         $this->assertFalse(isset($entity->name));
     }
 
+    /**
+     * @test
+     */
+    public function shouldValidatePartiallySuccessfully() : void
+    {
+        $entity = Entity::createFromJsonFile(__DIR__.'/../resources/test-schema.json');
+        $entity->name = 'John Doe';
+        $entity->age = 31;
+        $requiredFields = ['name', 'age'];
+        $this->assertTrue($entity->validatePartially($requiredFields));
+        $requiredFields = ['name', 'age', 'email'];
+        $this->expectException(\Selami\Entity\Exception\InvalidArgumentException::class);
+        $entity->validatePartially($requiredFields);
+    }
     /**
      * @test
      */
@@ -80,13 +94,15 @@ public function shouldCompareTwoEntityObjectSuccessfully() : void
     }
 
 
+
+
     /**
      * @test
      * @expectedException \Selami\Entity\Exception\InvalidArgumentException
      */
     public function shouldFailForRequiredInput() : void
     {
-        $model = Model::fromJsonFile(__DIR__.'/../resources/test-schema.json');
+        $model = Model::createFromJsonFile(__DIR__.'/../resources/test-schema.json');
         $entity = new Entity($model);
         $entity->name = 'John Doe';
         $entity->age = 31;
diff --git a/tests/unit/ModelTest.php b/tests/unit/ModelTest.php
index 4b9a193..c223f74 100644
--- a/tests/unit/ModelTest.php
+++ b/tests/unit/ModelTest.php
@@ -23,9 +23,19 @@ protected function _after()
      */
     public function shouldReturnModelObjectSuccessfully() : void
     {
-        $model = Model::fromJsonFile(__DIR__.'/../resources/test-schema.json');
+        $model = Model::createFromJsonFile(__DIR__.'/../resources/test-schema.json');
         $schema = $model->getSchema();
         $this->assertEquals('http://api.example.com/profile.json#', $schema->id());
+
+        $jsonSchema = file_get_contents(__DIR__.'/../resources/test-schema.json');
+        $tmpSchema = json_decode($jsonSchema);
+        $requiredFields = $tmpSchema->required;
+        $model = new Model($jsonSchema);
+        $this->assertEquals($tmpSchema, $model->getModel());
+        $modelRequiredFields = $model->getRequiredFields();
+        $this->assertEquals($modelRequiredFields, $requiredFields);
+        $schema = $model->getSchema($tmpSchema);
+        $this->assertEquals('http://api.example.com/profile.json#', $schema->id());
     }
 
     /**
@@ -34,7 +44,7 @@ public function shouldReturnModelObjectSuccessfully() : void
      */
     public function shouldFailForAFileThatDoesNotExist() : void
     {
-        $model = Model::fromJsonFile(__DIR__.'/../resources/test-schema-does-not-exist.json');
+        $model = Model::createFromJsonFile(__DIR__.'/../resources/test-schema-does-not-exist.json');
         $model->getSchema();
     }
 
@@ -44,7 +54,7 @@ public function shouldFailForAFileThatDoesNotExist() : void
      */
     public function shouldFailForAFileThatContainsInvalidJson() : void
     {
-        $model = Model::fromJsonFile(__DIR__.'/../resources/test-schema-invalid-json.json');
+        $model = Model::createFromJsonFile(__DIR__.'/../resources/test-schema-invalid-json.json');
         $model->getSchema();
     }
 }