From e9614574b67c3684634d2a56406040aa159a8868 Mon Sep 17 00:00:00 2001
From: Jack Berg <jberg@newrelic.com>
Date: Tue, 2 Apr 2024 14:48:40 -0500
Subject: [PATCH 1/2] Add synchronous gauge entry to sum monotonic table

---
 specification/metrics/sdk.md | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/specification/metrics/sdk.md b/specification/metrics/sdk.md
index bb2381b608c..8a6b131b312 100644
--- a/specification/metrics/sdk.md
+++ b/specification/metrics/sdk.md
@@ -560,13 +560,14 @@ The Sum Aggregation informs the SDK to collect data for the
 
 The monotonicity of the aggregation is determined by the instrument type:
 
-| Instrument Kind | `SumType` |
-| --- | --- |
-| [Counter](./api.md#counter) | Monotonic |
-| [UpDownCounter](./api.md#updowncounter) | Non-Monotonic |
-| [Histogram](./api.md#histogram) | Monotonic |
-| [Asynchronous Gauge](./api.md#asynchronous-gauge) | Non-Monotonic |
-| [Asynchronous Counter](./api.md#asynchronous-counter) | Monotonic |
+| Instrument Kind                                                   | `SumType`     |
+|-------------------------------------------------------------------|---------------|
+| [Counter](./api.md#counter)                                       | Monotonic     |
+| [UpDownCounter](./api.md#updowncounter)                           | Non-Monotonic |
+| [Histogram](./api.md#histogram)                                   | Monotonic     |
+| [Gauge](./api.md#gauge)                                           | Non-Monotonic |
+| [Asynchronous Gauge](./api.md#asynchronous-gauge)                 | Non-Monotonic |
+| [Asynchronous Counter](./api.md#asynchronous-counter)             | Monotonic     |
 | [Asynchronous UpDownCounter](./api.md#asynchronous-updowncounter) | Non-Monotonic |
 
 This Aggregation does not have any configuration parameters.

From 01614ea1644691bf1a3b2f0266153b3c18e57d67 Mon Sep 17 00:00:00 2001
From: Jack Berg <jberg@newrelic.com>
Date: Tue, 2 Apr 2024 14:50:25 -0500
Subject: [PATCH 2/2] Add changelog entry

---
 CHANGELOG.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3487c0c1609..11835d918d6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,9 @@ release.
 
 ### Metrics
 
+- Add synchronous gauge entry to sum monotonic table.
+  ([#3977](https://github.com/open-telemetry/opentelemetry-specification/pull/3977))
+
 ### Logs
 
 - Refine description of Instrumentation Scope.