--- doc/docbase/instrument_scripts/nksp/reference/01_nksp_reference.html	2017/06/27 22:19:19	3293
+++ doc/docbase/instrument_scripts/nksp/reference/01_nksp_reference.html	2017/06/27 23:29:31	3294
@@ -36,6 +36,10 @@
         <td>Check whether two arrays are equal.</td>
       </tr>
       <tr>
+        <td><code>fork()</code></td>
+        <td>Creates new execution instances.</td>
+      </tr>
+      <tr>
         <td><code lang="nksp">dec()</code></td>
         <td>Decrements the passed integer variable by one.</td>
       </tr>
@@ -319,6 +323,23 @@
         </td>
       </tr>
       <tr>
+        <td><code>%NKSP_CALLBACK_CHILD_ID[]</code></td>
+        <td>
+          Reflects the callback IDs of all child threads which the current
+          script callback instance spawned by calling function <code>fork()</code>.
+          See the latter function for details about this array variable.
+        </td>
+      </tr>
+      <tr>
+        <td><code>$NKSP_CALLBACK_PARENT_ID</code></td>
+        <td>
+          If the current execution thread is a child thread spawned by a <code>fork()</code>
+          call before, then this variable reflects the callback ID of the parent
+          thread which created this child thread. Otherwise this variable is zero.
+          See function <code>fork()</code> for more details about this variable.
+        </td>
+      </tr>
+      <tr>
         <td><code>$NKSP_REAL_TIMER</code></td>
         <td>Returns the current time stamp in reality (in microseconds). You may
             read this variable from time to time to take