The relative base time of the sliding timeline index must be a date-time literal or date-time expression that evaluates to a date and time, and should vary through time. If the expression does not vary through time, a regular primary timeline index should be used. The relative base time is reevaluated each time the search engine load is being updated.

Example

The above example uses a relative base time of `today`, which is reevaluated each time the search engine load is updated. The index will map a total of seven days, with one days worth of items mapped to an individual slot. As time moves forward, the limits of the timeline are automatically adjusted. Items falling outside the new timeline are removed from the data-store and associated indexes.