diff --git a/src/MicrodataDOMElement.php b/src/MicrodataDOMElement.php
index ef62b2c..439adf3 100644
--- a/src/MicrodataDOMElement.php
+++ b/src/MicrodataDOMElement.php
@@ -7,12 +7,8 @@ class MicrodataDOMElement extends \DOMElement
     public function getProperties()
     {
         $results = [];
-        $memory = [];
-        $pending = [];
-
-        $memory[] = $this;
-
-        $pending = array_merge($pending, $this->getChildElementNodes());
+        $memory = [$this];
+        $pending = $this->getChildElementNodes();
 
         if ($this->hasAttribute('itemref')) {
             $tokens = $this->tokenizeAttribute('itemref');
@@ -37,7 +33,7 @@ class MicrodataDOMElement extends \DOMElement
                 $pending = array_merge($pending, $current->getChildElementNodes());
             }
 
-            if ($current->hasAttribute('itemprop') && /* hasPropertyNames */ $current->getPropertyNames()) {
+            if ($current->hasAttribute('itemprop') && $current->hasPropertyNames()) {
                 $results[] = $current;
             }
         }
@@ -45,6 +41,10 @@ class MicrodataDOMElement extends \DOMElement
         return array_reverse($results);
     }
 
+    public function hasPropertyNames() {
+        return !empty($this->tokenizeAttribute('itemprop'));
+    }
+
     public function getPropertyNames()
     {
         $tokens = $this->tokenizeAttribute('itemprop');