add required tags

refpolicy/policy/modules/kernel/corenetwork.if.in

@@ -1,4 +1,7 @@
 ## <summary>Policy controlling access to network objects</summary>
+## <required val="true">
+##	Contains the initial SIDs for network objects.
+## </required>
 
 ########################################
 ## <summary>

refpolicy/policy/modules/kernel/filesystem.if

@@ -1,4 +1,7 @@
 ## <summary>Policy for filesystems.</summary>
+## <required val="true">
+##	Contains the initial SID for the filesystems.
+## </required>
 
 ########################################
 ## <desc>

refpolicy/policy/modules/kernel/kernel.if

@@ -1,7 +1,9 @@
 ## <summary>
-## Policy for kernel threads, proc filesystem,
-## and unlabeled processes and objects.
+##	Policy for kernel threads, proc filesystem,and unlabeled processes and objects.
 ## </summary>
+## <required val="true">
+##	This policy has initial SIDs.
+## </required>
 
 ########################################
 ## <desc>

refpolicy/policy/modules/kernel/selinux.if

@@ -1,6 +1,9 @@
 ## <summary>
 ## Policy for kernel security interface, in particular, selinuxfs.
 ## </summary>
+## <required val="true">
+##	Contains the policy for the kernel SELinux security interface.
+## </required>
 
 ########################################
 ## <desc>

refpolicy/policy/modules/system/domain.if

@@ -1,4 +1,7 @@
 ## <summary>Core policy for domains.</summary>
+## <required val="true">
+##	Contains the concept of a domain.
+## </required>
 
 ########################################
 #

refpolicy/policy/modules/system/files.if

@@ -14,6 +14,10 @@
 ## </ul>
 ## </p>
 ## </desc>
+## <required val="true">
+##	Contains the concept of a file.
+##	Comains the file initial SID.
+## </required>
 
 ########################################
 #