Verbs

All terms live in the bdm: namespace; the canonical id of initialized is bdm:initialized.

Verb	Layer	Object types	Description
initialized	lifecycle	RuntimeInstance	RuntimeInstance record minted; instrument loaded; engine ready. Nothing shown yet.
started	lifecycle	RuntimeInstance	First content actually shown to the participant; starts the experiential clock.
paused	lifecycle	RuntimeInstance	RuntimeInstance suspended (extended visibility loss, idle threshold, or explicit pause).
resumed	lifecycle	RuntimeInstance	RuntimeInstance continued after a pause. Carries bdm:pause_duration.
completed	lifecycle	RuntimeInstance	All required content done. Distinct from submitted.
submitted	lifecycle	RuntimeInstance	Data left the engine (POST to Orchestrator acknowledged).
abandoned	lifecycle	RuntimeInstance	RuntimeInstance ended without completion. Carries bdm:abandon_reason.
presented	presentation	Screen, Panel, Stimulus, Option, Feedback, ConsentForm	Something became perceivable (rendered or played). Typically the response-time anchor for Stimulus/Option.
clicked	interaction	Option, UIComponent	Pointer click (mouse, tap, stylus); the lowest-level click event.
drag_and_dropped	interaction	Option, UIComponent	A drag-and-drop gesture completed. Carries bdm:drag_source and bdm:drop_target.
key_pressed	interaction	UIComponent, Stimulus	A single key event. Carries bdm:key and bdm:key_code.
typed	interaction	UIComponent	A text input was committed (debounced). Carries bdm:typed_text and bdm:key_sequence.
selected	interaction	Option, UIComponent	Discrete option selected (radio, checkbox, dropdown).
deselected	interaction	Option, UIComponent	Discrete option deselected (e.g. checkbox unchecked).
adjusted	interaction	UIComponent	A continuous-value control was set (slider, spinner, dial). Carries bdm:current_value.
got_focus	interaction	UIComponent, Window	Focus gained by an input control or by the runtime window/tab.
lost_focus	interaction	UIComponent, Window	Focus lost. Window-level loss may (by threshold) lead to bdm:paused.
consented	interaction	Consent	The agent committed to consent. Carries bdm:consent_text_hash and bdm:consent_scope.
trial_started	system	Trial	A trial began. Carries bdm:trial_index and (when applicable) bdm:block_index / bdm:block_type.
trial_ended	system	Trial	Trial finalised; a Response (trial) row is created. Carries the canonical response_*, response_time, correct/score, and bdm:response_id. Exactly one per trial.
state_changed	system	Timer, Scorer, LocaleSwitch	A software-internal state change not tied to a presentation (timer, scorer, locale switch).
recording_started	recording	Recording	A continuous-data recording opened. Carries bdm:source and bdm:sample_rate.
recording_ended	recording	Recording	A recording closed and was stored. Carries bdm:recording_url, bdm:recording_sha256, bdm:duration.
navigated	navigation	Screen	Participant moved between Screens. Carries bdm:from_screen_id and bdm:to_screen_id.