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+module ietf-schc-coap {
+  yang-version 1.1;
+  namespace "urn:ietf:params:xml:ns:yang:ietf-schc-coap";
+  prefix schc-coap-ext;
+
+  import ietf-schc {
+      prefix schc;
+  }
+
+  organization
+    "IETF Static Context Header Compression (schc) Working Group";
+  contact
+    "WG Web:   <https://datatracker.ietf.org/wg/schc/about/>
+     WG List:  <mailto:schc@ietf.org>
+     Editor:   Marco Tiloca
+       <mailto:marco.tiloca@ri.se>";
+  description
+    "Copyright (c) 2021 IETF Trust and the persons identified as
+     authors of the code.  All rights reserved.
+     Redistribution and use in source and binary forms, with or
+     without modification, is permitted pursuant to, and subject to
+     the license terms contained in, the Simplified BSD License set
+     forth in Section 4.c of the IETF Trust's Legal Provisions
+     Relating to IETF Documents
+     (https://trustee.ietf.org/license-info).
+     This version of this YANG module is part of RFC XXXX
+     (https://www.rfc-editor.org/info/rfcXXXX); see the RFC itself
+     for full legal notices.
+     The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL
+     NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'NOT RECOMMENDED',
+     'MAY', and 'OPTIONAL' in this document are to be interpreted as
+     described in BCP 14 (RFC 2119) (RFC 8174) when, and only when,
+     they appear in all capitals, as shown here.
+     ****************************************************************
+
+     This module extends the ietf-schc module defined in RFC 9363 to
+     include the new CoAP options as defined in RFC YYYY.";
+
+  revision 2024-07-08 {
+    description
+      "New CoAP extensions and extended OSCORE fields.";
+    reference
+      "RFC YYYY Static Context Header Compression (SCHC) for the
+                Constrained Application Protocol (CoAP) (see
+                Sections 5 and 6)";
+  }
+
+  // Field ID
+
+  identity fid-coap-option-hop-limit {
+    base "schc:fid-coap-option";
+    description
+      "Hop Limit option to avoid infinite forwarding loops.";
+    reference
+      "RFC 8768 Constrained Application Protocol (CoAP) 
+                Hop-Limit Option.";
+  }
+
+  identity fid-coap-option-echo {
+    base "schc:fid-coap-option";
+    description
+      "Echo option.";
+    reference
+      "RFC 9175 Constrained Application Protocol (CoAP): 
+                Echo, Request-Tag, and Token Processing";
+  }
+
+  identity fid-coap-option-request-tag {
+    base "schc:fid-coap-option";
+    description
+      "Request-Tag option.";
+    reference
+      "RFC 9175 Constrained Application Protocol (CoAP): 
+                Echo, Request-Tag, and Token Processing";
+  }
+
+  identity fid-coap-option-q-block1 {
+    base "schc:fid-coap-option";
+    description
+      "Q-Block1 option.";
+    reference
+      "RFC 9177 Constrained Application Protocol (CoAP) 
+                Block-Wise Transfer Options Supporting 
+                Robust Transmission";
+  }
+
+  identity fid-coap-option-q-block2 {
+    base "schc:fid-coap-option";
+    description
+      "Q-Block2 option.";
+    reference
+      "RFC 9177 Constrained Application Protocol (CoAP) 
+                Block-Wise Transfer Options Supporting 
+                Robust Transmission";
+  }
+
+  identity fid-coap-option-edhoc {
+    base "schc:fid-coap-option";
+    description
+      "EDHOC option.";
+    reference
+      "RFC XXXX Using Ephemeral Diffie-Hellman Over COSE (EDHOC)
+                with the Constrained Application Protocol (CoAP)
+                and Object Security for Constrained RESTful
+                Environments (OSCORE)";
+  }
+
+  identity fid-coap-option-oscore-x {
+       base "schc:fid-coap-option";
+       description
+         "CoAP option OSCORE x field.";
+       reference
+         "RFC YYYY Static Context Header Compression (SCHC) for the
+                   Constrained Application Protocol (CoAP) (see
+                   Section 6.4)
+          RFC XXXX Key Update for OSCORE (KUDOS)";
+  }
+
+  identity fid-coap-option-oscore-nonce {
+       base "schc:fid-coap-option";
+       description
+         "CoAP option OSCORE nonce field.";
+       reference
+         "RFC YYYY Static Context Header Compression (SCHC) for the
+                   Constrained Application Protocol (CoAP) (see
+                   Section 6.4)
+          RFC XXXX Key Update for OSCORE (KUDOS)";
+  }
+
+  identity fid-coap-option-oscore-y {
+       base "schc:fid-coap-option";
+       description
+         "CoAP option OSCORE y field.";
+       reference
+         "RFC YYYY Static Context Header Compression (SCHC) for the
+                   Constrained Application Protocol (CoAP) (see
+                   Section 6.4)
+          RFC XXXX Key Update for OSCORE (KUDOS)";
+  }
+
+  identity fid-coap-option-oscore-oldnonce {
+       base "schc:fid-coap-option";
+       description
+         "CoAP option OSCORE old_nonce field.";
+       reference
+         "RFC YYYY Static Context Header Compression (SCHC) for the
+                   Constrained Application Protocol (CoAP) (see
+                   Section 6.4)
+          RFC XXXX Key Update for OSCORE (KUDOS)";
+  }
+ 
+  // Function Length
+
+  identity fl-oscore-oscore-nonce-length {
+       base "schc:fl-base-type";
+       description
+         "Size in bytes of the OSCORE nonce corresponding to m+1.";
+       reference
+         "RFC 8824 Static Context Header Compression (SCHC) for the
+                   Constrained Application Protocol (CoAP) (see
+                   Section 6.4).
+          RFC XXXX Key Update for OSCORE (KUDOS)";
+  }
+
+  identity fl-oscore-oscore-oldnonce-length {
+       base "schc:fl-base-type";
+       description
+         "Size in bytes of the OSCORE old_nonce corresponding to w+1.
+         ";
+       reference
+         "RFC YYYY Static Context Header Compression (SCHC) for the
+                   Constrained Application Protocol (CoAP) (see
+                   Section 6.4).
+          RFC XXXX Key Update for OSCORE (KUDOS)";
+  }
+}