diff --git a/categories/models.py b/categories/models.py
index a1475c4..1d45785 100644
--- a/categories/models.py
+++ b/categories/models.py
@@ -49,6 +49,20 @@ class Category(MPTTModel):
         ancestors = list(self.get_ancestors()) + [self,]
         return prefix + '/'.join([force_unicode(i.slug) for i in ancestors]) + '/'
     
+    if RELATION_MODELS:
+        def get_related_content_type(self, content_type):
+            """
+            Get all related items of the specified content type
+            """
+            return self.storyrelation_set.filter(
+                content_type__name=content_type)
+        
+        def get_relation_type(self, relation_type):
+            """
+            Get all relations of the specified relation type
+            """
+            return self.storyrelation_set.filter(relation_type=relation_type)
+    
     class Meta:
         verbose_name_plural = 'categories'
         unique_together = ('parent', 'name')