Finishing documentation
diff --git a/openstack/networking/v2/subnets/doc.go b/openstack/networking/v2/subnets/doc.go
index b15101b..43e8296 100644
--- a/openstack/networking/v2/subnets/doc.go
+++ b/openstack/networking/v2/subnets/doc.go
@@ -1 +1,10 @@
+// Package subnets contains functionality for working with Neutron subnet
+// resources. A subnet represents an IP address block that can be used to
+// assign IP addresses to virtual instances. Each subnet must have a CIDR and
+// must be associated with a network. IPs can either be selected from the whole
+// subnet CIDR or from allocation pools specified by the user.
+//
+// A subnet can also have a gateway, a list of DNS name servers, and host routes.
+// This information is pushed to instances whose interfaces are associated with
+// the subnet.
package subnets