diff --git a/src/as2.lisp b/src/as2.lisp
index 49aaf46..298c326 100644
--- a/src/as2.lisp
+++ b/src/as2.lisp
@@ -133,3 +133,25 @@
   result
   origin
   instrument)
+
+(defclass collection (object) ())
+(define-property-methods collection
+  total-items
+  current
+  first-as2
+  last-as2
+  items)
+
+(defclass ordered-collection (collection) ())
+(define-property-methods ordered-collection
+  ordered-items)
+
+(defclass collection-page (collection) ())
+(define-property-methods collection-page
+  part-of
+  next
+  prev)
+
+(defclass ordered-collection-page (ordered-collection collection-page) ())
+(define-property-methods ordered-collection-page
+  start-index)