The name of the session. Session names should be brief, lowercase, and should describe which UI
component the user is interacting with. In certain cases where the UI component is dynamic, they could include an ID, essential to identifying that component. An example of this is dynamic home panels: we use session names of the format ``homepanel:<panel_id>`` to identify home panel sessions.
Events capture key occurrences. They should be brief and simple, and should not contain sensitive or excess information. Context for events should come from the session (scope). An event can be created with four fields (via ``Telemetry.sendUIEvent``): ``action``, ``method``, ``extras``, and ``timestamp``.
The name of the event. Should be brief and lowercase. If needed, you can make use of namespacing with a '``.``' separator. Example event names: ``panel.switch``, ``panel.enable``, ``panel.disable``, ``panel.install``.
Used for user actions that can be performed in many ways. This field specifies the method by which the action was performed. For example, users can add an item to their reading list either by long-tapping the reader icon in the address bar, or from within reader mode. We would use the same event name for both user actions but specify two methods: ``addressbar`` and ``readermode``.
As a we improve on our Telemetry methods, it is foreseeable that our probes will change over time. Different versions of a probe could carry different data or have different interpretations on the server-side. To make it easier for the server to handle these changes, you should add version numbers to your event and session names. An example of a versioned session is ``homepanel.1``; this is version 1 of the ``homepanel`` session. This approach should also be applied to event names, an example being: ``panel.enable.1`` and ``panel.enable.2``.
Times are relative to either elapsed realtime (an arbitrary monotonically increasing clock that continues to tick when the device is asleep), or elapsed uptime (which doesn't tick when the device is in deep sleep). We default to elapsed realtime.
