EventsQuerySchemas

The query schema of each aggregate's events model as the Manifest states it: the source of the events array's declaration and the EventsQueryModelProfile of each aggregate type.

events[] is a union discriminated by name: one variant per event of the aggregate (its variant the event's name, <context>.<aggregate>.<Name>), {name, revision, body} with name that one name and body the event's schema in $defs, its x-wow-* keywords included, plus the system events wow.ScheduleSet and wow.ScheduleCancelled, whose bodies are objects of no declared property, as is the body of an event whose schema $defs lacks. An aggregate the Manifest does not hold has one variant of any name and a body of unknown shape. The stream's system fields come from the profile.

Revision-stable body fields. A pushed-down condition reads the body as the log stores it, at the revision it was committed at, while a record shows it upgraded to the current revision. A body path is stable when every event that declares it is at revision 1: no upgrader ever ran, so the stored body is the body read. A body path an event past revision 1 declares keeps only PRESENCE (adapter): filters, sorts and aggregations on it are rejected (UNSUPPORTED_CAPABILITY), as are those on the undescribed bodies.

Custom mask strategies (x-wow-mask.strategy) are resolved through strategies.