[OpenTelemetry] Add schema URL to resources

[martincostello]

#7723 (comment)

Changes

Add schema URL to internally created resources, where relevant, that were missed when implementing #7472.

Merge requirement checklist

• CONTRIBUTING guidelines followed (license requirements, nullable enabled, static analysis, etc.)
• Unit tests added/updated
• Appropriate CHANGELOG.md files updated for non-trivial changes
• Changes in public API reviewed (if applicable)

[opentelemetry-pr-dashboard]

Pull request dashboard status

Merged · refreshed 2026-09-10 16:41 UTC

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[martincostello]

Copied from here.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.63%. Comparing base (823da27) to head (59ef7d6).
⚠️ Report is 4 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7726      +/-   ##
==========================================
- Coverage   91.64%   91.63%   -0.02%     
==========================================
  Files         325      326       +1     
  Lines       18168    18165       -3     
==========================================
- Hits        16650    16645       -5     
- Misses       1518     1520       +2     

Flag	Coverage Δ
unittests-Project-Experimental	91.67% <100.00%> (-0.09%)	⬇️
unittests-Project-Stable	91.68% <100.00%> (-0.09%)	⬇️
unittests-Solution	91.75% <100.00%> (+0.03%)	⬆️
unittests-UnstableCoreLibraries-Experimental	51.07% <85.00%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...lemetry/Resources/OtelServiceNameEnvVarDetector.cs	100.00% <100.00%> (ø)
src/OpenTelemetry/Resources/ResourceBuilder.cs	91.52% <100.00%> (-0.28%)	⬇️
...enTelemetry/Resources/ResourceBuilderExtensions.cs	100.00% <100.00%> (ø)
src/OpenTelemetry/SemanticConventionsVersion.cs	100.00% <100.00%> (ø)

... and 6 files with indirect coverage changes

[Copilot]

🟡 Changes recommended

It unintentionally changes empty service-instance handling, and the tests do not verify the exact schema version.

Once you've addressed the issues Copilot identified, you can request another Copilot review.

Pull request overview

Adds semantic-convention schema URLs to resources created internally by the OpenTelemetry SDK.

Changes:

• Introduces centralized schema URL/version helpers.
• Applies schema URLs to default, telemetry SDK, service, and environment resources.
• Expands resource schema URL tests.

File summaries

File	Description
OpenTelemetry.slnx	Includes the shared schema helper.
OpenTelemetry.Extended.slnx	Includes the shared schema helper.
src/Shared/SchemaUrls.cs	Builds versioned schema URLs.
src/OpenTelemetry/SemanticConventionsVersion.cs	Defines semantic conventions version 1.44.0.
src/OpenTelemetry/OpenTelemetry.csproj	Links the shared helper.
src/OpenTelemetry/Resources/ResourceBuilder.cs	Adds schema URL to default resources.
src/OpenTelemetry/Resources/ResourceBuilderExtensions.cs	Adds schema URLs to SDK and service resources.
src/OpenTelemetry/Resources/OtelServiceNameEnvVarDetector.cs	Adds schema URL to detected service resources.
src/OpenTelemetry/CHANGELOG.md	Documents the behavioral change.
test/OpenTelemetry.Tests/Resources/ResourceTests.cs	Tests default resource schema propagation.
test/OpenTelemetry.Tests/Resources/ResourceBuilderTests.cs	Tests service resource schema URLs.
test/OpenTelemetry.Tests/Resources/OtelServiceNameEnvVarDetectorTests.cs	Tests detector schema URLs.

Review details

• Files reviewed: 12/12 changed files
• Comments generated: 2
• Review effort level: Balanced

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