diff --git a/language/duchain/types/abstracttype.h b/language/duchain/types/abstracttype.h
--- a/language/duchain/types/abstracttype.h
+++ b/language/duchain/types/abstracttype.h
@@ -70,11 +70,10 @@
  * - Implement a copy-constructor in which you copy the data from the source using copyData<YourType>()
  * - Override the clone() function in which you use the copy-constructor to clone the type
  * - Add an enumerator "Identity" that contains an arbitrary unique identity value of the type
- * - Add a typedef "BaseType" that specifies the base type, which must be a type that also follows these rules
  * - Register your type in a source-file using REGISTER_TYPE(..), @see typeregister.h
  * - Add a typedef "Data", that contains the actual data of the type using the mechanisms described in appendedlist.h.
- *  - That data type must follow the same inheritance chain as the type itself, so it must be based on BaseType::Data.
- *    @see AbstractTypeData
+ *   That data type must follow the same inheritance chain as the type itself, so it must be based on the Data object
+ *   of the base class. See AbstractTypeData.
  * - Use createData<YourType>() to create the data-object in a constructor (which you then reach to the parent constructor)
  * - Use TYPE_DECLARE_DATA(YourType) to declare the data access functions d_func and d_func_dynamic,
  *   and  then use d_func()->.. and d_func_dynamic()->.. to access your type data
diff --git a/language/duchain/types/containertypes.h b/language/duchain/types/containertypes.h
--- a/language/duchain/types/containertypes.h
+++ b/language/duchain/types/containertypes.h
@@ -131,7 +131,6 @@
     enum { Identity = 58 };
 
     typedef ListTypeData Data;
-    typedef KDevelop::StructureType BaseType;
 
 protected:
     TYPE_DECLARE_DATA(ListType);
@@ -202,7 +201,6 @@
     enum { Identity = 57 };
 
     typedef MapTypeData Data;
-    typedef KDevelop::StructureType BaseType;
 
 protected:
     TYPE_DECLARE_DATA(MapType);
diff --git a/language/duchain/types/unsuretype.h b/language/duchain/types/unsuretype.h
--- a/language/duchain/types/unsuretype.h
+++ b/language/duchain/types/unsuretype.h
@@ -77,7 +77,6 @@
     Identity = 39
   };
   
-  typedef KDevelop::AbstractType BaseType;
   typedef UnsureTypeData Data;
   
 protected: