Support Meter.TelemetrySchemaUrl in SDK, Exporter.InMemory and Exporter.Console (#6714)

Author: Kielek

src/OpenTelemetry.Exporter.Console/CHANGELOG.md

@@ -8,6 +8,8 @@ Notes](../../RELEASENOTES.md).
 
 * Added support for `ActivitySource.TelemetrySchemaUrl` property.
   ([#6713](https://github.com/open-telemetry/opentelemetry-dotnet/pull/6713))
+* Added support for `Meter.TelemetrySchemaUrl` property.
+  ([#6714](https://github.com/open-telemetry/opentelemetry-dotnet/pull/6714))
 
 ## 1.14.0
 

src/OpenTelemetry.Exporter.Console/ConsoleActivityExporter.cs

@@ -120,7 +120,7 @@ public override ExportResult Export(in Batch<Activity> batch)
 
             if (!string.IsNullOrEmpty(activity.Source.TelemetrySchemaUrl))
             {
-                this.WriteLine($"    Schema Url: {activity.Source.TelemetrySchemaUrl}");
+                this.WriteLine($"    Schema URL: {activity.Source.TelemetrySchemaUrl}");
             }
 
             if (activity.Source.Tags?.Any() == true)

src/OpenTelemetry.Exporter.Console/ConsoleMetricExporter.cs

@@ -73,6 +73,11 @@ public override ExportResult Export(in Batch<Metric> batch)
                 this.WriteLine($"\tVersion: {metric.MeterVersion}");
             }
 
+            if (!string.IsNullOrEmpty(metric.InstrumentIdentity.MeterSchemaUrl))
+            {
+                this.WriteLine($"\tSchema URL: {metric.MeterSchemaUrl}");
+            }
+
             if (metric.MeterTags?.Any() == true)
             {
                 this.WriteLine("\tTags:");

src/OpenTelemetry.Exporter.InMemory/.publicApi/Stable/PublicAPI.Unshipped.txt

@@ -0,0 +1 @@
+OpenTelemetry.Metrics.MetricSnapshot.MeterSchemaUrl.get -> string!

src/OpenTelemetry.Exporter.InMemory/CHANGELOG.md

@@ -6,6 +6,9 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+* Added support for `Meter.TelemetrySchemaUrl` property.
+  ([#6714](https://github.com/open-telemetry/opentelemetry-dotnet/pull/6714))
+
 ## 1.14.0
 
 Released 2025-Nov-12

src/OpenTelemetry.Exporter.InMemory/MetricSnapshot.cs

@@ -41,5 +41,9 @@ public MetricSnapshot(Metric metric)
 
     public string MeterVersion => this.instrumentIdentity.MeterVersion;
 
+#pragma warning disable CA1056 // Change the type of property from 'string' to 'System.Uri'
+    public string MeterSchemaUrl => this.instrumentIdentity.MeterSchemaUrl;
+#pragma warning restore CA1056 // Change the type of property from 'string' to 'System.Uri'
+
     public IReadOnlyList<MetricPoint> MetricPoints { get; }
 }

src/OpenTelemetry/.publicApi/Stable/PublicAPI.Unshipped.txt

@@ -1 +1,2 @@
+OpenTelemetry.Metrics.Metric.MeterSchemaUrl.get -> string!
 OpenTelemetry.Metrics.MetricReaderTemporalityPreference.LowMemory = 3 -> OpenTelemetry.Metrics.MetricReaderTemporalityPreference

src/OpenTelemetry/CHANGELOG.md

@@ -9,6 +9,9 @@ Notes](../../RELEASENOTES.md).
 * Added `LowMemory` temporality as an option in the OTLP metrics exporter.
   ([#6648](https://github.com/open-telemetry/opentelemetry-dotnet/pull/6648))
 
+* Added support for `Meter.TelemetrySchemaUrl` property.
+  ([#6714](https://github.com/open-telemetry/opentelemetry-dotnet/pull/6714))
+
 ## 1.14.0
 
 Released 2025-Nov-12

src/OpenTelemetry/Metrics/Metric.cs

@@ -231,6 +231,13 @@ internal Metric(
     /// </summary>
     public string MeterVersion => this.InstrumentIdentity.MeterVersion;
 
+    /// <summary>
+    /// Gets the meter schema URL for the metric stream.
+    /// </summary>
+#pragma warning disable CA1056 // Change the type of property from 'string' to 'System.Uri'
+    public string MeterSchemaUrl => this.InstrumentIdentity.MeterSchemaUrl;
+#pragma warning restore CA1056 // Change the type of property from 'string' to 'System.Uri'
+
     /// <summary>
     /// Gets the attributes (tags) for the metric stream.
     /// </summary>

src/OpenTelemetry/Metrics/MetricStreamIdentity.cs

@@ -16,6 +16,7 @@ public MetricStreamIdentity(Instrument instrument, MetricStreamConfiguration? me
         this.MeterName = instrument.Meter.Name;
         this.MeterVersion = instrument.Meter.Version ?? string.Empty;
         this.MeterTags = instrument.Meter.Tags != null ? new Tags(instrument.Meter.Tags.ToArray()) : null;
+        this.MeterSchemaUrl = instrument.Meter.TelemetrySchemaUrl ?? string.Empty;
         this.InstrumentName = metricStreamConfiguration?.Name ?? instrument.Name;
         this.Unit = instrument.Unit ?? string.Empty;
         this.Description = metricStreamConfiguration?.Description ?? instrument.Description ?? string.Empty;
@@ -33,6 +34,7 @@ public MetricStreamIdentity(Instrument instrument, MetricStreamConfiguration? me
         hashCode.Add(this.InstrumentType);
         hashCode.Add(this.MeterName);
         hashCode.Add(this.MeterVersion);
+        hashCode.Add(this.MeterSchemaUrl);
         hashCode.Add(this.MeterTags);
         hashCode.Add(this.InstrumentName);
         hashCode.Add(this.HistogramRecordMinMax);
@@ -65,6 +67,7 @@ public MetricStreamIdentity(Instrument instrument, MetricStreamConfiguration? me
             hash = (hash * 31) + this.InstrumentType.GetHashCode();
             hash = (hash * 31) + this.MeterName.GetHashCode();
             hash = (hash * 31) + this.MeterVersion.GetHashCode();
+            hash = (hash * 31) + this.MeterSchemaUrl.GetHashCode();
             hash = (hash * 31) + this.MeterTags?.GetHashCode() ?? 0;
             hash = (hash * 31) + this.InstrumentName.GetHashCode();
             hash = (hash * 31) + this.HistogramRecordMinMax.GetHashCode();
@@ -92,6 +95,8 @@ public MetricStreamIdentity(Instrument instrument, MetricStreamConfiguration? me
 
     public string MeterVersion { get; }
 
+    public string MeterSchemaUrl { get; }
+
     public Tags? MeterTags { get; }
 
     public string InstrumentName { get; }
@@ -138,6 +143,7 @@ public bool Equals(MetricStreamIdentity other)
         return this.InstrumentType == other.InstrumentType
             && this.MeterName == other.MeterName
             && this.MeterVersion == other.MeterVersion
+            && this.MeterSchemaUrl == other.MeterSchemaUrl
             && this.InstrumentName == other.InstrumentName
             && this.Unit == other.Unit
             && this.Description == other.Description