diff --git a/doc/OnlineDocs/library_reference/contrib.rst b/doc/OnlineDocs/library_reference/contrib.rst
index 04192bee67e..eba55cb8931 100644
--- a/doc/OnlineDocs/library_reference/contrib.rst
+++ b/doc/OnlineDocs/library_reference/contrib.rst
@@ -1,5 +1,21 @@
 Third-Party Contributions
 =========================
 
-* `pyomo.contrib.simplemodel <http://pyomocontrib-simplemodel.readthedocs.io/en/latest/>`_
+Pyomo includes a variety of additional features and functionality
+provided by third parties through the ``pyomo.contrib`` package.  This
+package includes both contributions included with the main Pyomo
+distribution and wrappers for third-party packages that must be
+installed separately.
+
+These packages are maintained by the original contributors and are
+managed as *optional* Pyomo packages.
+
+Contributed packages distributed with Pyomo:
+
+*
+
+Contributed packages distributed independently of Pyomo, but accessible
+through ``pyomo.contrib``:
+
+* `pyomo.contrib.simplemodel <http://pyomocontrib-simplemodel.readthedocs.io/en/latest/source.html>`_
 
diff --git a/doc/OnlineDocs/library_reference/index.rst b/doc/OnlineDocs/library_reference/index.rst
index bf431533d4c..9c406fdeac4 100644
--- a/doc/OnlineDocs/library_reference/index.rst
+++ b/doc/OnlineDocs/library_reference/index.rst
@@ -1,14 +1,26 @@
 Library Reference
 =================
 
-Pyomo is being increasingly used as a library to support Python
-scripts.  This section describes library APIs for key elements of Pyomo.
+Pyomo is being increasingly used as a library embedded within larger
+Python scripts or projects.  This section describes the core library
+APIs for key elements of Pyomo useful to application developers.
 
 .. toctree::
    :maxdepth: 1
 
-   kernel/index.rst
    aml/index.rst
    data/index.rst
    solvers/index.rst
+
+Pyomo is under active ongoing development.  The following API
+documentation describes *Beta* functionality.
+
+.. toctree::
+   :maxdepth: 1
+   kernel/index.rst
+
+Finally, Pyomo includes a number of third-party extensions:
+
+.. toctree::
+   :maxdepth: 1
    contrib.rst