Intent to Ship: Attribution Reporting API Features (Trigger Data Customization and Aggregatable Value Filters)

[Akash Nadan]

Contact emails

akash...@google.com, lin...@chromium.org, john...@chromium.org

Explainer

Attribution Reporting with event-level reports

Attribution Reporting API with Aggregatable Reports

Aggregation Service for the Attribution Reporting API

Specification

https://wicg.github.io/attribution-reporting-api/

Blink component

Internals > AttributionReporting

Summary

We plan on landing the following changes to the Attribution Reporting API focused on:

• additional API configurability for event-level reporting by supporting customization for trigger data cardinality and values

• additional API configurability for summary reports by supporting filters in aggregatable values

Explainer/Spec changes

• Allow sources to customize trigger data cardinality and values
• Allow trigger side filtering on aggregation keys

Risks
Interoperability and Compatibility

Both features are fully backwards compatible changes and are optional features.

              

Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)?

All except Android WebView

Is this feature fully tested by web-platform-tests?

Yes

Estimated milestones

Chrome 123

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5170344510095360

Links to previous Intent discussions

Previous I2S: 

Intent to Ship: Attribution Reporting API

Intent to Ship: Attribution Reporting features M117

Intent to Ship: Attribution Reporting features M118

Intent to Ship: Attribution Reporting features M119

Intent to Ship: Attribution Reporting features M120

Intent to Ship: Attribution Reporting features M121

[Domenic Denicola]

LGTM1. I appreciate the detailed explainers and well-reviewed spec updates.

I noticed the TAG review field was missing, but it seems the TAG review for the base feature is still ongoing since 2022-03-24, so I agree with the decision to not derailing that ongoing review by requesting additional review for small additions like this.

[Yoav Weiss (@Shopify)]

LGTM2

[Alex Russell]

Hey folks,

I also appreciate the quality of the design work here, but we need developer interest to be able to launch features out ahead of other engines. Was an OT done? What other signals do we have to go on?

Best,

Alex

[Akash Nadan]

Hi All,

We did not do an OT for these features. But we have discussed and collected feedback regarding these features with multiple ad-techs and have shared these features during the WICG (web platform incubator community group) weekly calls.

Thanks,

Akash

[Peter Beverloo]

Hi Akash - the Attribution Reporting API is supported in Android WebView, why won't these extensions be?

Thanks,

Peter

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[Akash Nadan]

Hi Peter,

The Attribution Reporting Web API is currently not supported in Android WebView, but events can be delegated to Android. These extensions are only for the web API.

Thanks,

Akash

[Mike Taylor]

Hi Akash,

Could you please clarify: if WebView supports the web API (which it does, IIUC?), these new features also be supported in the WebView context, correct?

I'm not able to find where the Attribution Reporting API is _disabled_ for WebView (assuming it would be in https://source.chromium.org/chromium/chromium/src/+/main:android_webview/browser/aw_field_trials.cc;l=72-73).

To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/3872fc46-5e98-4e4f-bf2d-f03c89bf287dn%40chromium.org.

[Nan Lin]

Hi Mike,

The web API is not supported for WebView (

https://source.chromium.org/chromium/chromium/src/+/main:android_webview/browser/aw_content_browser_client.cc;l=1217?q=aw_content_browser_client&ss=chromium), and therefore these features in the web API are not supported for WebView, but may be supported when these features are supported in the Android API.

Thanks,

Nan

To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/81a21048-14c6-4495-82b5-7259894fe34e%40chromium.org.

[Mike Taylor]

Thank you for the code pointer (and education). LGTM3

[Akash Nadan]

Thanks all. Just adding the following Github Issue with additional context regarding the need for these features: https://github.com/WICG/attribution-reporting-api/issues/733

Thanks,

Akash