added description of param mapping

index.bs

@@ -1540,11 +1540,17 @@ If the user refuses consent, the authenticator returns an appropriate error stat
     </dd>
     <dt>"public-key-uaf"</dt>
     <dd>
-Follow the procedure as specified in [[FIDO-UAF-Authenticator-Commands]] section 6.3.  
-On successful completion, the [=authenticator=] returns to the user agent:
-- The identifier of the credential used to generate the signature.
-- binary authenticator generated data according to the structure as specified in [[FIDO-UAF-Authenticator-Commands]] section 5.2.2.
-- The assertion signature.
+- Follow the procedure as specified in [[FIDO-UAF-Authenticator-Commands]] section 6.3. Using
+    * The caller's RP ID as "AppID"
+    * The [=hash of the serialized client data=] as "Final Challenge Hash".
+    * If present: The content of extension txAuthSimple (i.e. the string) or txAuthGeneric (i.e. the content bytes) as "Transaction Content".
+    * If a list of credentials acceptable to the [=[RP]=] was provided: Provide each {{PublicKeyCredential/rawId}} as "KeyHandle".  If an empty list was provided do not provide any "KeyHandle".
+    * Provide a "KHAccessToken" as described in section 6.1. in [[FIDO-UAF-ASM]].
+    * Provide no "UserVerificationToken".
+- On successful completion, the [=authenticator=] returns to the user agent:
+    * The identifier of the credential used to generate the signature.
+    * binary authenticator generated data according to the structure as specified in [[FIDO-UAF-Authenticator-Commands]] section 5.2.2.
+    * The assertion signature.
 
 If the [=authenticator=] cannot find any credential corresponding to the specified [RP] that matches the specified criteria, it
 terminates the operation and returns an error.
@@ -3451,6 +3457,13 @@ Axel Nennker, Kimberly Paulhamus, Adam Powers, Yaron Sheffer, Mike West, Jeffrey
     "status": "FIDO Alliance Implementation Draft"
   },
 
+  "FIDO-UAF-ASM": {
+    "authors": ["R. Lindemann", "J. Kemp", "D. Baghdasaryan", "B. Hill", "R. Sasson", "J. Hodges", "K. Yang"],
+    "title": "FIDO UAF Authenticator-Specific Module API",
+    "href": "https://fidoalliance.org/specs/fido-uaf-v1.1-id-20170202/fido-uaf-asm-api-v1.1-id-20170202.html",
+    "status": "FIDO Alliance Implementation Draft"
+  },
+
   "FIDO-UAF-Protocol": {
     "authors": ["R. Lindemann", "E. Tiffany", "D. Baghdasaryan", "D. Balfanz", "B. Hill", "J. Hodges", "K. Yang"],
     "title": "FIDO UAF Protocol",