Discriminator identifying this as a DAAST tracker asset. See /schemas/creative/asset-types for the registry.
The DAAST tracking event this URL fires on. MUST NOT be impression (model as url asset with url_type: "tracker_pixel"), clickTracking / customClick (click-tracking trackers go on their own URL asset), error, or any of the ViewableImpression-element children (viewable, notViewable, viewUndetermined, measurableImpression, viewableImpression).
Tracker URL that fires when daast_event occurs. May carry AdCP universal macros; the sales agent or ad server URL-encodes substituted values at serve time. See docs/creative/universal-macros.mdx.
Optionaloffset?: stringDAAST offset attribute. Required when daast_event is progress (DAAST 1.1 §3.2.4.3); ignored otherwise. Same format as VAST 4.2 Tracking@offset: HH:MM:SS or HH:MM:SS.mmm for absolute time (two-digit hours, minutes 00–59, seconds 00–59), or an integer percentage 0–100 suffixed with %. Negative offsets are NOT permitted.
Optionaltarget?: "linear" | "companion"Which DAAST creative element this tracker scopes to — linear for <Linear>/<TrackingEvents> (DAAST 1.1 §3.2.1.7), companion for <CompanionAds>/<Companion>/<TrackingEvents> (DAAST 1.1 §3.2.2.7, where the only valid event is creativeView). DAAST has no <NonLinearAds> element. Defaults to linear. Sales agents use this to place the tracker in the correct location during DAAST assembly.
Optionalprovenance?: Provenance
A single tracker URL bound to a DAAST
TrackingEventsevent. Audio-side analogue of vast-tracker-asset. TheImpressionURL MUST be modeled as aurlasset withurl_type: "tracker_pixel", not as a daast_tracker withdaast_event: "impression".