diff --git a/dprod.html b/dprod.html
index a0b29ac..2c08a27 100644
--- a/dprod.html
+++ b/dprod.html
@@ -255,20 +255,41 @@ <h2>domain</h2>
       </section>
 
         <section>
-        <h2>port</h2>
+        <h2>inputPort</h2>
         <table class="def propdef">
         <tbody>
-          <tr><th>Identifier:</th> <td><code>dprod:port</code></td></tr>
+          <tr><th>Identifier:</th> <td><code>dprod:inputPort</code></td></tr>
 
-          <tr><th>Label:</th><td>port</td></tr>
+          <tr><th>Label:</th><td>inputPort</td></tr>
 
-          <tr><th>Notes:</th><td>a port describes a set of services exposed by a data product.</td></tr>
+          <tr><th>Notes:</th><td>an input port describes a set of services exposed by a data product to collect its source data and makes it available for further internal transformation. An input port can receive data from one or more upstream sources in a push (i.e. asynchronous subscription) or pop mode (i.e. synchronous query). Each data product may have one or more input ports</td></tr>
           <tr><th>Domain:</th><td>https://ekgf.github.io/data-product-spec/dprod/DataProduct</td></tr>
           <tr><th>Range:</th><td>http://www.w3.org/ns/dcat#DataService</td></tr>
         </tbody>
         </table>
       </section>
 
+        <section>
+        <h2>outputPort</h2>
+        <table class="def propdef">
+        <tbody>
+          <tr><th>Identifier:</th> <td><code>dprod:outputPort</code></td></tr>
+
+          <tr><th>Label:</th><td>outputPort</td></tr>
+
+          <tr><th>Notes:</th><td>an output port describes a set of services exposed by a data product to share the generated data in a way that can be understood and trusted </td></tr>
+          <tr><th>Domain:</th><td>https://ekgf.github.io/data-product-spec/dprod/DataProduct</td></tr>
+          <tr><th>Range:</th><td>http://www.w3.org/ns/dcat#DataService</td></tr>
+        </tbody>
+        </table>
+      </section>
+
+      </section>
+
+      <section>
+      <h2>DistributionShape</h2>
+
+
       </section>
 
       <section>
@@ -284,14 +305,8 @@ <h2>DataProductShape</h2>
       </section>
 
       <section>
-      <h2>Protocol</h2>
-        A protocol, possibly including a specific version, used for communicating with a service
-
-      </section>
+      <h2>DatasetShape</h2>
 
-      <section>
-      <h2>Enumeration</h2>
-        The superclass of enumeration lists referenced from Data Product related artifacts
 
       </section>
 
@@ -308,14 +323,14 @@ <h2>DataServiceShape</h2>
       </section>
 
       <section>
-      <h2>DatasetShape</h2>
-
+      <h2>Protocol</h2>
+        A protocol, possibly including a specific version, used for communicating with a service
 
       </section>
 
       <section>
-      <h2>DistributionShape</h2>
-
+      <h2>Enumeration</h2>
+        The superclass of enumeration lists referenced from Data Product related artifacts
 
       </section>