This document covers the high-level changes made in topics throughout this site. Refer back to this page for guidance on what documentation topics to revisit for new and updated content.
2020-12-02 Updated the definition of the telemetry data structure
We updated the definition of the data structure for telemetry data gathered for Exposure Notifications. The following fields were added for Exposure Notifications:
MatchingState.matching_result, with the values:
The following fields were added for Exposure Notifications Express:
work_manager_task.Statusand its fields:
2020-11-02 List of Exposure Notifications apps
Added a list of publicly-available Exposure Notifications apps.
2020-10-02 API version 1.7
Version 1.7 of the Exposure Notifications API corresponds to the following changes and additions to the documentation:
Updated the documentation regarding available modes:
Added new details to explain the rationale for migrating from the legacy v1 mode to ExposureWindow mode.
Replaced all references to v1 mode with the legacy v1 mode.
Updated the descriptions of the
ExposureWindowclass to reflect new behavior: exposures to other users should not contribute to the risk value if their diagnosis keys are mapped by configuration to either of the following values:
provideDiagnosisKeys()documentation to note that, in the legacy v1 mode, the method can insert multiple batches of files containing key information into the on-device database. Previously, the number of diagnosis keys that could be passed in this mode was incorrectly listed as one.
Corrected the description of
daysSinceExposureThresholdto reflect existing behavior.
2020-09-11 Added export file validation guide
Added the Exposure key export file format and validation guide. Also added a section to the Exposure Notifications implementation guide.
2020-09-10 Expanded definitions of totalRiskScore and minimumRiskScore
2020-09-09 Updated code sample
ExistingPeriodicWorkPolicy.REPLACE in the code sample in Best practices for
This resolves an issue with WorkManager sometimes not adding a job to the system
2020-09-02 Time data corrected
Updated the API
to show the correct quota reset time (00:00 UTC) in the
2020-07-24 Quota information updated
Added further explanation of quotas to Exposure Notifications API:
- The word "day" was defined as "midnight to midnight of the device's local time zone."
- The quota was updated for allowlisted accounts from 1,000 per day to 1,000,000 per day.
2020-07-20 Google Play services snippets
Added Google Play services snippets and Telemetry design to the site. These topics and the exposure-notifications-internals GitHub repository provide information about the Google Play services layer of the Exposure Notifications system.
2020-07-07 API version 1.5
Version 1.5 of the Exposure Notifications API corresponds to the following changes and additions to the documentation:
- Introduction of
tokens to switch between working in ExposureWindow mode and v1 mode.
ExposureWindows, a new way of determining the risk associated with an exposure. And when using the ExposureWindow mode:
- New quota restrictions on the
provideDiagnosisKeys()method: 6 per day when using the framework in ExposureWindow mode versus the 20 per day in v1 mode.
getExposureSummary()is superseded in ExposureWindow mode, relying instead on computing risk scores based on
- Deprecation of
getExposureInformation()and addition of
- New quota restrictions on the
2020-07-07 Debug mode changes with API version 1.5
The Debug mode changed with version 1.5 of the API. You can read more about the changes in the Debug mode options in API version 1.5 section of the topic.
2020-07-02 Error handling documentation
The documentation covering error-handling in the framework was expanded.
20202-06-22 Bluetooth LE attenuation documentation
Three topics covering aspects of Bluetooth LE (BLE) attenuation were published:
- Exposure Notifications BLE attenuations
- Exposure Notifications BLE calibration calculation
- Exposure Notifications BLE RSSI calibration procedure
2020-06-14 Exposure Notification Verification System documentation released
Documentation covering the Exposure Notifications verification server was published. This server validates positive diagnoses of COVID-19 when users consent to uploading their status.