CDDL description of location extension

index.bs

@@ -2969,7 +2969,7 @@ This [=registration extension=] and [=authentication extension=] enables use of
 ## Location Extension (loc) ## {#sctn-location-extension}
 
 The location [=registration extension=] and [=authentication extension=] provides the client device's current location to the
-WebAuthn [=[RP]=].
+WebAuthn [=[RP]=].  
 
 : Extension identifier
 :: `loc`
@@ -3001,6 +3001,16 @@ WebAuthn [=[RP]=].
     Specification](https://dev.w3.org/geo/api/spec-source.html#coordinates_interface).
 
     <pre>
+    CDDL:
+      {
+       loc: positionCoordinates,
+      }    
+      positionCoordinates = [
+         latitude: float64,
+         longitude: float64,
+         altitude: float64
+         ]
+     CBOR Example:
         ...                                         -- [=RP ID=] hash (32 bytes)
         81                                          -- TUP and ED set
         00 00 00 01                                 -- (initial) signature counter
@@ -3093,7 +3103,6 @@ This [=registration extension=] and [=authentication extension=] enables use of
                     01           -- Subitem 3: CBOR short for Matcher Protection Type Software
     </pre>
 
-
 # IANA Considerations # {#sctn-IANA}
 
 ## WebAuthn Attestation Statement Format Identifier Registrations ## {#sctn-att-fmt-reg}