diff --git a/src/SeriousJSON/JsonDatabase.php b/src/SeriousJSON/JsonDatabase.php
index be20fd7..a260c21 100644
--- a/src/SeriousJSON/JsonDatabase.php
+++ b/src/SeriousJSON/JsonDatabase.php
@@ -189,22 +189,22 @@ class JsonDatabase implements IJsonUnflattener
         return $name;
     }
 
-    public function delete(string $className, $identifier): bool
+    public function delete(string $className, $identifier, ?int $timestamp = null): bool
     {
-        if ($class == null || empty(trim($name)))
+        if ($className == null || empty(trim($identifier)))
             return false;
         
-        if ($name != null && !empty(trim(strval($name))))
-            $name = JSONDatabase::SanitizeIdentifier($name);
+        if ($identifier != null && !empty(trim(strval($identifier))))
+            $identifier = JSONDatabase::SanitizeIdentifier($identifier);
         else
             return false;
         
-        $class = trim($class);
+        $class = trim($className);
         
         if (!$this->audit && $timestamp != null)
             return false;
         
-        $objPath = $this->getObjectPath($class, $name, ($timestamp != null));
+        $objPath = $this->getObjectPath($className, $identifier, ($timestamp != null));
 
         if (strlen($objPath) > PHP_MAXPATHLEN)
             return false;
@@ -215,7 +215,7 @@ class JsonDatabase implements IJsonUnflattener
         return unlink($objPath);
     }
 
-    public function delete(IJsonIdentifiable $obj): bool
+    public function deleteObj(IJsonIdentifiable $obj): bool
     {
         return $this->delete(get_class($obj), $obj->flatIdentifier());
     }
diff --git a/src/SeriousJSON/JsonSerializable.php b/src/SeriousJSON/JsonSerializable.php
index dec7ecc..41e6e60 100644
--- a/src/SeriousJSON/JsonSerializable.php
+++ b/src/SeriousJSON/JsonSerializable.php
@@ -37,6 +37,52 @@ abstract class JsonSerializable
         return (new \ReflectionClass($typeName))->isSubclassOf(JsonSerializable::class);
     }
 
+    /**
+     * Check if is strongly typed array of type JsonSerializable and return the type
+     * @param string $property Property we should check against
+     * @return bool returns class name if type/class of property extends JsonSerializable
+     */
+    private static function getPropertyArrayType(\ReflectionProperty $property)
+    {
+        if (!isset($property) || $property === null || !$property->hasType())
+            return false;
+        
+        // Get builtin type or class of given property
+        $type = $property->getType();
+
+        // A built-in type is any type that is not a class, interface, or trait.
+        // Assume false on simple types, we can only check this on classes
+        if (!$type->isBuiltin() && $type->getName() != 'array')
+            return null;
+
+        $docComment = $property->getDocComment();
+
+        if (!$docComment)
+            return null;
+
+        $line = strtok($docComment, "\r\n");
+        
+        // TODO: Maybe use preg_match here, maybe faster: https://stackoverflow.com/a/6250269
+        while ($line !== false) {
+            $docType = substr($line, strpos($line, '@type ') + 6);
+            if (!empty(trim($docType)))
+            {
+                $docType = trim($docType);
+                if (class_exists($docType)) {
+                    $refClass = new \ReflectionClass($docType);
+                    if ($refClass->isSubclassOf(JsonSerializable::class))
+                        return $refClass->getName();
+                }
+                // We found a type property, do not further iterate
+                return null;
+            }
+
+            $line = strtok( "\r\n" );
+        }
+
+        return null;
+    }
+
     /**
      * Serialize a JsonSerializable Object to an array or to a json string
      * @param bool $nested Indicates if we should also serialize nested object instances
@@ -68,6 +114,13 @@ abstract class JsonSerializable
                     continue;
 
             }
+            else if (isset($value) && $value != null && is_array($value)) {
+                $arrayType = self::getPropertyArrayType(new \ReflectionProperty($this, $key));
+                if ($arrayType != null)
+                    $result[$key] = self::SerializeArray($value, $nested, true);
+                else
+                    $result[$key] = $value;
+            }
             else {
                 $result[$key] = $value;
             }
@@ -86,17 +139,29 @@ abstract class JsonSerializable
      * @param bool $nested Indicates if we should also serialize nested object instances
      * @return string returns a json formatted string
      */
-    public static function SerializeArray($objects = [], $nested = false)
+    public static function SerializeArray($objects = [], $nested = false, $to_array = false)
     {
         // Initialize a an array of results
         $results = array();
 
         // Iterate through provided JsonSerializable Objects and serialize them
-        foreach ($objects as $object)
-            $results[] = $object->Serialize($nested, true);
+        foreach ($objects as $object) {
+            if ($object instanceof JsonSerializable)
+            {
+                if ($nested)
+                    $results[] = $object->Serialize(nested: true, to_array: true);
+                else if ($object instanceof IJsonIdentifiable && $object->flatIdentifier() !== null)
+                    $results[] = $object->flatIdentifier();
+                else
+                    continue;
+            }
+        }
         
-        // Return the json encoded string
-        return json_encode($results);
+        // If json is demanded, encode, else just return the array
+        if ($to_array)
+            return $results;
+        else
+            return json_encode($results);
     }
 
     /**
@@ -135,7 +200,15 @@ abstract class JsonSerializable
             // If simple data type, just assign it to var in class
             // TODO: Exception handling, what if class specifies an int but string was provided?
             $selfSubclass = self::isPropertyJsonSerializable($property);
-            if ($selfSubclass)
+            $arrayType = self::getPropertyArrayType($property);
+            if ($arrayType != null)
+            {
+                if (is_array($value))
+                    $classInstance->{$key} = self::DeserializeArray($value, $nested, $callback, $arrayType);
+                else
+                    continue;
+            }
+            elseif ($selfSubclass)
             {
                 try {
                     if (is_array($value)) {
@@ -183,7 +256,7 @@ abstract class JsonSerializable
      * @param string|array $json json string containing the array or array to decode
      * @return JsonSerializable[] Returns an Array of Instances of JsonSerializable
      */
-    public static function DeserializeArray(string|array $json, bool $nested = false)
+    public static function DeserializeArray(string|array $json, bool $nested = false, IJsonUnflattener $callback = null, string $className = null)
     {
         // Check if we need to decode from json first
         if (is_string($json))
@@ -194,14 +267,12 @@ abstract class JsonSerializable
         // Loop through the array
         foreach ($json as $item)
         {
-            // Uh oh, check if there is an nested array within the array and deserialize children
-            // If not, or if we are not supposed to, just deserialize the current layer or ignore
-            if ($nested && is_array($item))
-                $items[] = self::DeserializeArray(json: $item, nested: $nested);
-            else if (is_array($item))
-                continue;
+            if (is_array($item))
+                $items[] = self::Deserialize(json: $item, nested: $nested, callback: $callback, className: $className);
+            else if ($className != null && $callback != null && !is_object($item))
+                $items[] = call_user_func([$callback, 'unflattenByID'], $className, $item);
             else
-                $items[] = self::Deserialize(json: $item, nested: $nested);
+                continue;
         }
 
         // Returns the result