diff --git a/refpolicy/README b/refpolicy/README
index 0896c07..2bbc966 100644
--- a/refpolicy/README
+++ b/refpolicy/README
@@ -56,3 +56,75 @@ checklabels		Check the labels on the filesystem, and report when
 
 restorelabels		Relabel the filesystem and report each file that is
 			relabeled.
+
+2) Reference Policy Directories
+All directories relative to the root of the Reference Policy sources directory.
+
+config/appconfig-*	Application configuration files for all configurations
+			of the Reference Policy (targeted/strict with or without
+			MLS or MCS).  These are used by SELinux-aware programs.
+
+config/local.users	The file read by load policy for adding SELinux users
+			to the policy on the fly.
+
+doc/html/*		This contains the contents of the in-policy XML
+			documentation, presented in web page form.
+
+doc/policy.dtd		The doc/policy.xml file is validated against this DTD.
+
+doc/policy.xml		This file is generated/updated by the conf and html make
+			targets.  It contains the complete XML documentation
+			included in the policy.
+
+doc/templates/*		Templates used for documentation web pages.
+
+policy/booleans.conf	This file is generated/updated by the conf make target.
+			It contains the booleans in the policy, and their
+			default values.  If tunables are implemented as
+			booleans, tunables will also be included.  This file
+			will be installed as the /etc/selinux/NAME/booleans
+			file.
+
+policy/constraints	This file defines additional constraints on permissions
+			in the form of boolean expressions that must be
+			satisfied in order for specified permissions to be
+			granted.  These constraints are used to further refine
+			the type enforcement rules and the role allow rules.
+			Typically, these constraints are used to restrict
+			changes in user identity or role to certain domains.
+
+policy/global_booleans	This file defines all booleans that have a global scope,
+			their default value, and documentation.
+
+policy/global_tunables	This file defines all tunables that have a global scope,
+			their default value, and documentation.
+
+policy/mcs		The multi-category security (MCS) configuration.
+
+policy/mls		The multi-level security (MLS) configuration.
+
+policy/flask/initial_sids  This file has declarations for each initial SID.
+
+policy/flask/security_classes  This file has declarations for each security class.
+
+policy/flask/access_vectors  This file defines the access vectors.  Common
+			prefixes for access vectors may be defined at the
+			beginning of the file.  After the common prefixes are
+			defined, an access vector may be defined for each
+			security class.
+
+policy/modules/*	Each directory represents a layer in Reference Policy
+			all of the modules are contained in one of these layers.
+
+policy/modules.conf	This file contains a listing of available modules, and
+			how they will be used when building Reference Policy. To
+			prevent a module from  being used, set the module to
+			"off".  For monolithic policies, modules set to "base"
+			and "module" will be included in the policy.  For
+			modular policies, modules set to "base"	will be included
+			in the base module; those set to "module" will be
+			compiled as individual loadable	modules.
+
+policy/support/*	Support macros.
+
+support/*		Scripts and other tools used to help build the policy.