diff --git a/GPy/kern/__init__.py b/GPy/kern/__init__.py
index a5fd01ad..33301817 100644
--- a/GPy/kern/__init__.py
+++ b/GPy/kern/__init__.py
@@ -1,15 +1,26 @@
 
 """
+Introduction
+^^^^^^^^^^^^
 
-In terms of Gaussian Processes, a kernel is a function that specifies the degree of similarity between variables given their relative positions in parameter space. If known variables *x* and *x'* are close together then observed variables *y* and *y'* may also be similar, depending on the kernel function and its parameters.
+In terms of Gaussian Processes, a kernel is a function that specifies the degree of similarity between variables given their relative positions in parameter space. If known variables *x* and *x'* are close together then observed variables *y* and *y'* may also be similar, depending on the kernel function and its parameters. *Note: this may be too simple a definition for the broad range of kernels available in :py:class:`GPy`.*
 
 :py:class:`GPy.kern.src.kern.Kern` is a generic kernel object inherited by more specific, end-user kernels used in models. It provides methods that specific kernels should generally have such as :py:class:`GPy.kern.src.kern.Kern.K` to compute the value of the kernel, :py:class:`GPy.kern.src.kern.Kern.add` to combine kernels and numerous functions providing information on kernel gradients.
 
-.. inheritance-diagram:: GPy.kern.src.kern.Kern
+There are several inherited types of kernel that provide a basis for specific end user kernels:
+
+.. inheritance-diagram:: GPy.kern.src.kern.Kern GPy.kern.src.static GPy.kern.src.stationary GPy.kern.src.kern.CombinationKernel GPy.kern.src.brownian GPy.kern.src.linear GPy.kern.src.standard_periodic
+   :top-classes: GPy.core.parameterization.parameterized.Parameterized
+
+e.g. the archetype :py:class:`GPy.kern.RBF` does not inherit directly from :py:class:`GPy.kern.src.kern.Kern`, but from :py:class:`GPy.kern.src.stationary`.
+
+.. inheritance-diagram:: GPy.kern.src.kern.Kern GPy.kern.RBF
    :top-classes: GPy.core.parameterization.parameterized.Parameterized
 
 """
 
+
+
 from .src.kern import Kern
 from .src.add import Add
 from .src.prod import Prod