Revise spec

nasa · Jan 15, 2025 · fd118d5 · fd118d5
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diff --git a/docs/fpp-spec.html b/docs/fpp-spec.html
@@ -3501,6 +3501,14 @@ <h5 id="Definitions_Topology-Definitions_Semantics_Checking-Telemetry-Packet-Gro
 </li>
 </ol>
 </div>
+<div class="paragraph">
+<p>Note that a telemetry packet group specifier is not required.
+If there is no specifier, then the topology has no packet definitions.
+Note also that two or more telemetry packet group specifiers
+are allowed.
+Each one specifies a way of assigning the telemetry channels
+of the topology to packets.</p>
+</div>
 </div>
 <div class="sect4">
 <h5 id="Definitions_Topology-Definitions_Semantics_Automatic-Numbering-of-Ports">Automatic Numbering of Ports</h5>
@@ -10882,7 +10890,7 @@ <h3 id="Analysis-and-Translation_Translation-Tools">22.4. Translation Tools</h3>
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-Last updated 2025-01-15 09:58:41 -0800
+Last updated 2025-01-15 13:14:02 -0800
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diff --git a/docs/spec/Definitions/Topology-Definitions.adoc b/docs/spec/Definitions/Topology-Definitions.adoc
@@ -126,6 +126,13 @@ the same name.
 . Check that each telemetry packet group specifier is
 <<Specifiers_Telemetry-Packet-Group-Specifiers_Semantics,valid>>.
 
+Note that a telemetry packet group specifier is not required.
+If there is no specifier, then the topology has no packet definitions.
+Note also that two or more telemetry packet group specifiers
+are allowed.
+Each one specifies a way of assigning the telemetry channels
+of the topology to packets.
+
 ===== Automatic Numbering of Ports
 
 FPP automatically assigns port numbers as follows.