--- a/spec/Overview-WebCryptoAPI.xml	Mon Jul 22 12:08:19 2013 -0700
+++ b/spec/Overview-WebCryptoAPI.xml	Mon Jul 22 12:08:23 2013 -0700
@@ -1156,20 +1156,20 @@
 
   <span class="comment">// TBD: <a href="https://www.w3.org/2012/webcrypto/track/issues/36">ISSUE-36</a></span>
   Promise&lt;any&gt; <a href="#dfn-SubtleCrypto-method-generateKey">generateKey</a>(<a href="#dfn-AlgorithmIdentifier">AlgorithmIdentifier</a> algorithm,
-                           boolean extractable = false,
-                           <a href="#dfn-KeyUsage">KeyUsage</a>[] keyUsages = []);
+                           optional boolean extractable = false,
+                           optional <a href="#dfn-KeyUsage">KeyUsage</a>[] keyUsages = []);
   Promise&lt;any&gt; <a href="#dfn-SubtleCrypto-method-deriveKey">deriveKey</a>(<a href="#dfn-AlgorithmIdentifier">AlgorithmIdentifier</a> algorithm,
                          <a href="#dfn-Key">Key</a> baseKey,
                          <a href="#dfn-AlgorithmIdentifier">AlgorithmIdentifier</a>? derivedKeyType,
-                         boolean extractable = false,
-                         <a href="#dfn-KeyUsage">KeyUsage</a>[] keyUsages = []);
+                         optional boolean extractable = false,
+                         optional <a href="#dfn-KeyUsage">KeyUsage</a>[] keyUsages = []);
   
   <span class="comment">// TBD: <a href="https://www.w3.org/2012/webcrypto/track/issues/35">ISSUE-35</a></span>
   Promise&lt;any&gt; <a href="#dfn-SubtleCrypto-method-importKey">importKey</a>(<a href="#dfn-KeyFormat">KeyFormat</a> format,
                          CryptoOperationData keyData,
                          <a href="#dfn-AlgorithmIdentifier">AlgorithmIdentifier</a>? algorithm,
-                         boolean extractable = false,
-                         <a href="#dfn-KeyUsage">KeyUsage</a>[] keyUsages = []);
+                         optional boolean extractable = false,
+                         optional <a href="#dfn-KeyUsage">KeyUsage</a>[] keyUsages = []);
   Promise&lt;any&gt; <a href="#dfn-SubtleCrypto-method-exportKey">exportKey</a>(<a href="#dfn-KeyFormat">KeyFormat</a> format, <a href="#dfn-Key">Key</a> key);
 
   <span class="comment">// Note: wrapKey and unwrapKey remain "Features at Risk"</span>
@@ -1181,9 +1181,9 @@
                          CryptoOperationData wrappedKey,
                          <a href="#dfn-Key">Key</a> unwrappingKey,
                          <a href="#dfn-AlgorithmIdentifier">AlgorithmIdentifier</a> unwrapAlgorithm,
-                         <a href="#dfn-AlgorithmIdentifier">AlgorithmIdentifier?</a> unwrappedKeyAlgorithm,
-                         boolean extractable = false,
-                         <a href="#dfn-KeyUsage">KeyUsage</a>[] keyUsages = []);
+                         <a href="#dfn-AlgorithmIdentifier">AlgorithmIdentifier</a>? unwrappedKeyAlgorithm,
+                         optional boolean extractable = false,
+                         optional <a href="#dfn-KeyUsage">KeyUsage</a>[] keyUsages = []);
 };
         </x:codeblock>
         <div class="ednote">

--- a/spec/Overview.html	Mon Jul 22 12:08:19 2013 -0700
+++ b/spec/Overview.html	Mon Jul 22 12:08:23 2013 -0700
@@ -1165,20 +1165,20 @@
 
   <span class="comment">// TBD: <a href="https://www.w3.org/2012/webcrypto/track/issues/36">ISSUE-36</a></span>
   Promise&lt;any&gt; <a href="#dfn-SubtleCrypto-method-generateKey">generateKey</a>(<a href="#dfn-AlgorithmIdentifier">AlgorithmIdentifier</a> algorithm,
-                           boolean extractable = false,
-                           <a href="#dfn-KeyUsage">KeyUsage</a>[] keyUsages = []);
+                           optional boolean extractable = false,
+                           optional <a href="#dfn-KeyUsage">KeyUsage</a>[] keyUsages = []);
   Promise&lt;any&gt; <a href="#dfn-SubtleCrypto-method-deriveKey">deriveKey</a>(<a href="#dfn-AlgorithmIdentifier">AlgorithmIdentifier</a> algorithm,
                          <a href="#dfn-Key">Key</a> baseKey,
                          <a href="#dfn-AlgorithmIdentifier">AlgorithmIdentifier</a>? derivedKeyType,
-                         boolean extractable = false,
-                         <a href="#dfn-KeyUsage">KeyUsage</a>[] keyUsages = []);
+                         optional boolean extractable = false,
+                         optional <a href="#dfn-KeyUsage">KeyUsage</a>[] keyUsages = []);
   
   <span class="comment">// TBD: <a href="https://www.w3.org/2012/webcrypto/track/issues/35">ISSUE-35</a></span>
   Promise&lt;any&gt; <a href="#dfn-SubtleCrypto-method-importKey">importKey</a>(<a href="#dfn-KeyFormat">KeyFormat</a> format,
                          CryptoOperationData keyData,
                          <a href="#dfn-AlgorithmIdentifier">AlgorithmIdentifier</a>? algorithm,
-                         boolean extractable = false,
-                         <a href="#dfn-KeyUsage">KeyUsage</a>[] keyUsages = []);
+                         optional boolean extractable = false,
+                         optional <a href="#dfn-KeyUsage">KeyUsage</a>[] keyUsages = []);
   Promise&lt;any&gt; <a href="#dfn-SubtleCrypto-method-exportKey">exportKey</a>(<a href="#dfn-KeyFormat">KeyFormat</a> format, <a href="#dfn-Key">Key</a> key);
 
   <span class="comment">// Note: wrapKey and unwrapKey remain "Features at Risk"</span>
@@ -1190,9 +1190,9 @@
                          CryptoOperationData wrappedKey,
                          <a href="#dfn-Key">Key</a> unwrappingKey,
                          <a href="#dfn-AlgorithmIdentifier">AlgorithmIdentifier</a> unwrapAlgorithm,
-                         <a href="#dfn-AlgorithmIdentifier">AlgorithmIdentifier?</a> unwrappedKeyAlgorithm,
-                         boolean extractable = false,
-                         <a href="#dfn-KeyUsage">KeyUsage</a>[] keyUsages = []);
+                         <a href="#dfn-AlgorithmIdentifier">AlgorithmIdentifier</a>? unwrappedKeyAlgorithm,
+                         optional boolean extractable = false,
+                         optional <a href="#dfn-KeyUsage">KeyUsage</a>[] keyUsages = []);
 };
         </code></pre></div></div>
         <div class="ednote"><div class="ednoteHeader">Editorial note</div>