Merge pull request #2915 from vespa-engine/bratseth/specify-output

Specify output

en/reference/indexing-language-reference.html

@@ -470,7 +470,7 @@ <h3 id="other">Other expressions</h3>
   </tr>
   <tr>
     <td><code>
-      if&nbsp;(&lt;lhs&gt;&nbsp;&lt;cmp&gt;&nbsp;&lt;rhs&gt;)&nbsp;{<br/>
+      if&nbsp;(&lt;left&gt;&nbsp;&lt;cmp&gt;&nbsp;&lt;right&gt;)&nbsp;{<br/>
       &nbsp;&nbsp;&nbsp;&nbsp;&lt;trueScript&gt;<br />
       }<br />
       [&nbsp;else&nbsp;{&nbsp;&lt;falseScript&gt;&nbsp;}&nbsp;]
@@ -479,7 +479,9 @@ <h3 id="other">Other expressions</h3>
       <p id="if">
       Executes the <code>trueScript</code> if the conditional evaluates to true,
       or the <code>falseScript</code> if it evaluates to false.
-      If either <code>lhs</code> or <code>rhs</code> is null, no expression is executed.
+      If either <code>left</code> or <code>right</code> is null, no expression is executed.
+      The value produced is the value returned from the chosen branch, and these must
+      produce values of compatible types (or none).
       </p>
     </td>
   </tr>