Adding docs
diff --git a/openstack/compute/v2/extensions/secgroups/results.go b/openstack/compute/v2/extensions/secgroups/results.go
index 17adf44..8610bd5 100644
--- a/openstack/compute/v2/extensions/secgroups/results.go
+++ b/openstack/compute/v2/extensions/secgroups/results.go
@@ -7,34 +7,62 @@
 	"github.com/rackspace/gophercloud/pagination"
 )
 
+// SecurityGroup represents a security group.
 type SecurityGroup struct {
-	ID          string
-	Name        string
+	// The unique ID of the group.
+	ID string
+
+	// The human-readable name of the group, which needs to be unique.
+	Name string
+
+	// The human-readable description of the group.
 	Description string
-	Rules       []Rule
-	TenantID    string `mapstructure:"tenant_id"`
+
+	// The rules which determine how this security group operates.
+	Rules []Rule
+
+	// The ID of the tenant to which this security group belongs to.
+	TenantID string `mapstructure:"tenant_id"`
 }
 
+// Rule represents a security group rule, a policy which determines how a
+// security group operates and what inbound traffic it allows in.
 type Rule struct {
-	ID            string
-	FromPort      int     `mapstructure:"from_port"`
-	ToPort        int     `mapstructure:"to_port"`
-	IPProtocol    string  `mapstructure:"ip_protocol"`
-	IPRange       IPRange `mapstructure:"ip_range"`
-	ParentGroupID string  `mapstructure:"parent_group_id"`
-	Group         Group
+	// The unique ID
+	ID string
+
+	// The lower bound of the port range which this security group should open up
+	FromPort int `mapstructure:"from_port"`
+
+	// The upper bound of the port range which this security group should open up
+	ToPort int `mapstructure:"to_port"`
+
+	// The IP protocol (e.g. TCP) which the security group accepts
+	IPProtocol string `mapstructure:"ip_protocol"`
+
+	// The CIDR IP range whose traffic can be received
+	IPRange IPRange `mapstructure:"ip_range"`
+
+	// The security group ID which this rule belongs to
+	ParentGroupID string `mapstructure:"parent_group_id"`
+
+	// Not documented.
+	Group Group
 }
 
+// IPRange represents the IP range whose traffic will be accepted by the
+// security group.
 type IPRange struct {
 	CIDR string
 }
 
+// Group represents a group.
 type Group struct {
 	TenantID string `mapstructure:"tenant_id"`
 	Name     string
 }
 
-// RolePage is a single page of a user Role collection.
+// SecurityGroupPage is a single page of a SecurityGroup collection.
 type SecurityGroupPage struct {
 	pagination.SinglePageBase
 }
@@ -63,14 +91,17 @@
 	gophercloud.Result
 }
 
+// CreateResult represents the result of a create operation.
 type CreateResult struct {
 	commonResult
 }
 
+// GetResult represents the result of a get operation.
 type GetResult struct {
 	commonResult
 }
 
+// UpdateResult represents the result of an update operation.
 type UpdateResult struct {
 	commonResult
 }
@@ -89,10 +120,12 @@
 	return &response.SecurityGroup, err
 }
 
+// AddRuleResult represents the result when adding rules to a security group.
 type AddRuleResult struct {
 	gophercloud.Result
 }
 
+// Extract will extract a Rule struct from an AddResultRule.
 func (r AddRuleResult) Extract() (*Rule, error) {
 	if r.Err != nil {
 		return nil, r.Err