diff --git a/utils/cheat_sheet_src/src/v1model_std_metadata.txt b/utils/cheat_sheet_src/src/v1model_std_metadata.txt
index 5b10226..5214a05 100644
--- a/utils/cheat_sheet_src/src/v1model_std_metadata.txt
+++ b/utils/cheat_sheet_src/src/v1model_std_metadata.txt
@@ -1,22 +1,26 @@
 struct standard_metadata_t {
+    // For more details see docs/simple_switch.md
+    // in https://github.com/p4lang/behavioral-model
+
+    // Should only read, ingress or egress
     bit<9>  ingress_port;
-    bit<9>  egress_spec;
-    bit<9>  egress_port;
-    bit<32> clone_spec;
     bit<32> instance_type;
-    bit<1>  drop;
-    bit<16> recirculate_port;
     bit<32> packet_length;
+    bit<48> ingress_global_timestamp;
+    bit<1>  checksum_error;
+    error   parser_error;
+
+    // In ingress, read or write.
+    // In egress, should only read.
+    bit<9>  egress_spec;
+    bit<16> mcast_grp;
+
+    // Should only read, only in egress
+    bit<9>  egress_port;
+    bit<16> egress_rid;
+    bit<48> egress_global_timestamp;
     bit<32> enq_timestamp;
     bit<19> enq_qdepth;
     bit<32> deq_timedelta;
     bit<19> deq_qdepth;
-    bit<48> ingress_global_timestamp;
-    bit<48> egress_global_timestamp;
-    bit<32> lf_field_list;
-    bit<16> mcast_grp;
-    bit<32> resubmit_flag;
-    bit<16> egress_rid;
-    bit<1>  checksum_error;
-    bit<32> recirculate_flag;
-}
\ No newline at end of file
+}