[EntityFrameworkCore] Add schema URL to traces

src/OpenTelemetry.Instrumentation.EntityFrameworkCore/CHANGELOG.md

@@ -5,6 +5,9 @@
 * Updated OpenTelemetry core component version(s) to `1.15.2`.
   ([#4080](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4080))
 
+* Add instrumentation schema URL to traces.
+  ([#4078](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4078))
+
 ## 1.15.0-beta.1
 
 Released 2026-Jan-21

src/OpenTelemetry.Instrumentation.EntityFrameworkCore/Implementation/EntityFrameworkDiagnosticListener.cs

@@ -3,7 +3,6 @@
 
 using System.Data;
 using System.Diagnostics;
-using System.Reflection;
 using OpenTelemetry.Internal;
 using OpenTelemetry.Trace;
 
@@ -18,12 +17,9 @@ internal sealed class EntityFrameworkDiagnosticListener : ListenerHandler
     internal const string EntityFrameworkCoreCommandExecuted = "Microsoft.EntityFrameworkCore.Database.Command.CommandExecuted";
     internal const string EntityFrameworkCoreCommandError = "Microsoft.EntityFrameworkCore.Database.Command.CommandError";
 
-    internal static readonly Assembly Assembly = typeof(EntityFrameworkDiagnosticListener).Assembly;
-#pragma warning disable IDE0370 // Suppression is unnecessary
-    internal static readonly string ActivitySourceName = Assembly.GetName().Name!;
-#pragma warning restore IDE0370 // Suppression is unnecessary
-    internal static readonly string ActivityName = ActivitySourceName + ".Execute";
-    internal static readonly ActivitySource EntityFrameworkActivitySource = new(ActivitySourceName, Assembly.GetPackageVersion());
+    internal static readonly Version SemanticConventionsVersion = new(1, 36, 0);
+    internal static readonly ActivitySource EntityFrameworkActivitySource = ActivitySourceFactory.Create<EntityFrameworkDiagnosticListener>(SemanticConventionsVersion);
+    internal static readonly string ActivityName = EntityFrameworkActivitySource.Name + ".Execute";
 
     private readonly PropertyFetcher<object> commandFetcher = new("Command");
     private readonly PropertyFetcher<object> connectionFetcher = new("Connection");

src/OpenTelemetry.Instrumentation.EntityFrameworkCore/OpenTelemetry.Instrumentation.EntityFrameworkCore.csproj

@@ -20,6 +20,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <Compile Include="$(RepoRoot)\src\Shared\ActivitySourceFactory.cs" Link="Includes\ActivitySourceFactory.cs" />
     <Compile Include="$(RepoRoot)\src\Shared\AssemblyVersionExtensions.cs" Link="Includes\AssemblyVersionExtensions.cs" />
     <Compile Include="$(RepoRoot)\src\Shared\DatabaseSemanticConventionHelper.cs" Link="Includes\DatabaseSemanticConventionHelper.cs" />
     <Compile Include="$(RepoRoot)\src\Shared\DiagnosticSourceListener.cs" Link="Includes\DiagnosticSourceListener.cs" />

src/OpenTelemetry.Instrumentation.EntityFrameworkCore/TracerProviderBuilderExtensions.cs

@@ -61,7 +61,7 @@ public static TracerProviderBuilder AddEntityFrameworkCoreInstrumentation(
             return new EntityFrameworkInstrumentation(options);
         });
 
-        builder.AddSource(EntityFrameworkDiagnosticListener.ActivitySourceName);
+        builder.AddSource(EntityFrameworkDiagnosticListener.EntityFrameworkActivitySource.Name);
 
         return builder;
     }

test/OpenTelemetry.Instrumentation.EntityFrameworkCore.Tests/EntityFrameworkDiagnosticListenerTests.cs

@@ -490,6 +490,11 @@ private static void VerifyActivityData(Activity activity, bool isError = false,
         Assert.Equal(ActivityKind.Client, activity.Kind);
         Assert.Equal("sqlite", activity.Tags.FirstOrDefault(t => t.Key == SemanticConventions.AttributeDbSystem).Value);
 
+        Assert.Equal("OpenTelemetry.Instrumentation.EntityFrameworkCore", activity.Source.Name);
+        Assert.NotNull(activity.Source.Version);
+        Assert.NotEmpty(activity.Source.Version);
+        Assert.StartsWith("https://opentelemetry.io/schemas/", activity.Source.TelemetrySchemaUrl);
+
         // TBD: SqlLite not setting the DataSource so it doesn't get set.
         Assert.DoesNotContain(activity.Tags, t => t.Key == "peer.service");
         Assert.DoesNotContain(activity.Tags, t => t.Key == "server.address");