Introduce |response| variable in RP registration operation

index.bs

@@ -2708,12 +2708,11 @@ structures.
 
 ## Registering a new credential ## {#registering-a-new-credential}
 
-When registering a new credential, represented by a {{AuthenticatorAttestationResponse}} structure, as part of a
+When registering a new credential, represented by a {{AuthenticatorAttestationResponse}} structure |response|, as part of a
 [=registration=] [=ceremony=], a [=[RP]=] MUST proceed as follows:
 
-1. Perform JSON deserialization on the {{AuthenticatorResponse/clientDataJSON}} field of the
-    {{AuthenticatorAttestationResponse}} object to extract the [=client data=] |C| claimed as collected during the credential
-    creation.
+1. Perform JSON deserialization on <code>|response|.{{AuthenticatorResponse/clientDataJSON}}</code> to extract the [=client data=]
+    |C| claimed as collected during the credential creation.
 
 1. Verify that the {{CollectedClientData/type}} in |C| is the string `webauthn.create`.
 
@@ -2729,7 +2728,7 @@ When registering a new credential, represented by a {{AuthenticatorAttestationRe
     and that the {{CollectedClientData/authenticatorExtensions}} in |C| is also a subset of the extensions requested by
     the RP.
 
-1. Compute the hash of {{AuthenticatorResponse/clientDataJSON}} using SHA-256.
+1. Compute the hash of <code>|response|.{{AuthenticatorResponse/clientDataJSON}}</code> using SHA-256.
 
 1. Perform CBOR decoding on the {{AuthenticatorAttestationResponse/attestationObject}} field of the
     {{AuthenticatorAttestationResponse}} structure to obtain the attestation statement format |fmt|, the [=authenticator data=]