Applying collection-level weightings to components in a meta collection will allow up-weighting/down-weighting
of results based on the collection that they are sourced from, with the
cool.21 parameter controlling how
much influence this weighting has on the overall ranking.
The given value must be in the range zero to one (inclusive).
Note that when this value is modified via the
value API, a meta collection update is
automatically triggered to cause the meta collection’s index to be updated to reflect
If a change is made via the
value-raw API, the configuration editor’s "Edit raw data" screen or by editing
the config file directly in some other way the meta collection update must be manually triggered.
To increase the weighting for a sub-collection with the id