--- a/discovery-api/Overview.src.html	Mon Feb 04 14:00:59 2013 +0100
+++ b/discovery-api/Overview.src.html	Mon Feb 04 15:18:11 2013 +0100
@@ -971,18 +971,19 @@
       </h2>
       <p>
         A <a>user agent</a> conforming to this specification MAY implement <abbr title=
-        "Simple Service Discovery Protocol">SSDP</abbr> [[!UPNP-DEVICEARCH11]], Zeroconf [[!DNS-SD]] + [[!MDNS]] or
+        "Simple Service Discovery Protocol">SSDP</abbr> [[!UPNP-DEVICEARCH11]], Zeroconf [[!DNS-SD]] + [[!MDNS]] and/or
         <abbr title="Discovery and Launch Protocol">DIAL</abbr> [<a href=
         "https://sites.google.com/a/dial-multiscreen.org/dial/dial-protocol-specification">DIAL</a>] <dfn>service
         discovery mechanisms</dfn> - the requirements detailed in this section of the specification - to enable Web
-        pages to request and connect with HTTP services running on networked devices, discovered via either mechanism,
-        through this API. When a <a>user agent</a> implements either of these <a>service discovery mechanisms</a>, then
-        it MUST conform to the corresponding algorithms provided in this section of the specification.
+        pages to request and connect with HTTP services running on networked devices, discovered via any of these
+        mechanisms, through this API. When a <a>user agent</a> implements any of these <a>service discovery
+        mechanisms</a>, then it MUST conform to the corresponding algorithms provided in this section of the
+        specification.
       </p>
       <p>
-        This section presents how the results of these two <a>service discovery mechanisms</a> will be matched to
-        requested service types, how the user agent stores available and active services and how their properties are
-        applied to any resulting <a href="#networkservice"><code>NetworkService</code></a> objects.
+        This section presents how the results of these <a>service discovery mechanisms</a> will be matched to requested
+        service types, how the user agent stores available and active services and how their properties are applied to
+        any resulting <a href="#networkservice"><code>NetworkService</code></a> objects.
       </p>
       <p>
         It is expected that user agents will perform these <a>service discovery mechanisms</a> asynchronously and
@@ -1009,13 +1010,11 @@
       </p>
       <p>
         The rule for <dfn>adding an available service</dfn> is the process of adding a new service or updating an
-        existing service in the <a>list of available service records</a> that is generally available on the user's
-        current network. This rule takes one argument, <var>network service record</var>, and consists of running the
+        existing service that is generally available on the user's current network in the <a>list of available service
+        records</a>. This rule takes one argument, <var>network service record</var>, and consists of running the
         following steps:
       </p>
       <ol class="rule">
-        <li>Let <var>new service registration flag</var> be <code>true</code>.
-        </li>
         <li>For each <var>existing service record</var> in the current <a>list of available service records</a>, run
         the following sub-steps:
           <ol class="rule">
@@ -1023,19 +1022,17 @@
             service record</var>'s <code>id</code> property then abort any remaining sub-steps and continue at the next
             available <var>existing service record</var>.
             </li>
-            <li>Set <var>new service registration flag</var> to <code>false</code>.
-            </li>
             <li>Replace the value of <var>existing service record</var> in the current <a>list of available service
-            records</a> with the value of <var>network service record</var>.
+            records</a> with the value of <var>network service record</var>, aborting any remaining steps in this
+            algorithm and return.
             </li>
           </ol>
         </li>
-        <li>If <var>new service registration flag</var> is set to <code>true</code> then add <var>network service
-        record</var> to the <a>list of available service records</a> as a new item.
+        <li>Add <var>network service record</var> to the <a>list of available service records</a> as a new item.
         </li>
         <li>For each <var>service manager</var> in the <a>list of active service managers</a> run the following steps:
           <ol class="rule">
-            <li>Let <var>service type in current service manager flag</var> be <code>false</code>.
+            <li>Let <var>'service type in current service manager' flag</var> be <code>false</code>.
             </li>
             <li>For each <var>active service</var> in <var>service manager</var> run the following steps:
               <ol class="rule">
@@ -1043,12 +1040,10 @@
                 service</var>'s <code>type</code> attribute then abort any remaining sub-steps for this <var>active
                 service</var> and continue at the next available <var>active service</var>.
                 </li>
-                <li>Set the <var>service type in current service manager flag</var> to <code>true</code>.
+                <li>Set the <var>'service type in current service manager' flag</var> to <code>true</code>.
                 </li>
-                <li>If the <var>new service registration flag</var> is set to <code>false</code>, the <var>network
-                service record</var>'s <code>id</code> property equals the <var>active service</var>'s <code>id</code>
-                attribute and <var>active service</var>'s <a href="#dom-networkservice-online"><code>online</code></a>
-                attribute is currently set to <code>false</code> then set <var>active service</var>'s <a href=
+                <li>If the <var>network service record</var>'s <code>id</code> property equals the <var>active
+                service</var>'s <code>id</code> attribute then set <var>active service</var>'s <a href=
                 "#dom-networkservice-online"><code>online</code></a> attribute to <code>true</code> and then <a href=
                 "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
                       class="externalDFN">queue a task</a> to dispatch a newly created event with the name <a href=
@@ -1059,11 +1054,10 @@
                 </li>
               </ol>
             </li>
-            <li>If the <var>new service registration flag</var> is set to <code>true</code> and the <var>service type
-            in current service manager flag</var> is also set to <code>true</code> then increment <var>service
-            manager</var>'s <a href="#dom-networkservices-servicesavailable"><code>servicesAvailable</code></a>
-            attribute by <code>1</code> and then <a href=
-            "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
+            <li>If the <var>'service type in current service manager' flag</var> is set to <code>true</code> then
+            increment <var>service manager</var>'s <a href=
+            "#dom-networkservices-servicesavailable"><code>servicesAvailable</code></a> attribute by <code>1</code> and
+            then <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
                   class="externalDFN">queue a task</a> to dispatch a newly created event with the name <a href=
                   "#event-serviceavailable"><code>serviceavailable</code></a> that uses the <a href=
                   "http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
@@ -1095,7 +1089,7 @@
             <li>For each <var>service manager</var> in the <a>list of active service managers</a> run the following
             steps:
               <ol class="rule">
-                <li>Let <var>service type in current service manager flag</var> be <code>false</code>.
+                <li>Let <var>'service type in current service manager' flag</var> be <code>false</code>.
                 </li>
                 <li>For each <var>active service</var> in <var>service manager</var> run the following steps:
                   <ol class="rule">
@@ -1103,7 +1097,7 @@
                     <var>active service</var>'s <code>type</code> attribute then abort any remaining sub-steps for this
                     <var>active service</var> and continue at the next available <var>active service</var>.
                     </li>
-                    <li>Set the <var>service type in current service manager flag</var> to <code>true</code>.
+                    <li>Set the <var>'service type in current service manager' flag</var> to <code>true</code>.
                     </li>
                     <li>If <var>existing service record</var>'s <code>id</code> property equals the <var>active
                     service</var>'s <code>id</code> attribute and <var>active service</var>'s <a href=
@@ -1119,7 +1113,7 @@
                     </li>
                   </ol>
                 </li>
-                <li>If the <var>service type in current service manager flag</var> is set to <code>true</code> then
+                <li>If the <var>'service type in current service manager' flag</var> is set to <code>true</code> then
                 decrement <var>service manager</var>'s <a href=
                 "#dom-networkservices-servicesavailable"><code>servicesAvailable</code></a> attribute by <code>1</code>
                 and then <a href=