A filter facet (not to be confused with a facet filter) allows you to return a count of the hits matching the filter. The filter itself can be expressed using the Query DSL. For example:
{
"facets" : {
"wow_facet" : {
"filter" : {
"term" : { "tag" : "wow" }
}
}
}
}
Note, filter facet filters are faster than query facet when using native filters (non query wrapper ones).
