Facets are organized perspectives of data. It is a way to count and display how the results of a query distribute into subsets. Faceting makes it easy for users to “drill down” into more and more specific results, discovering patterns as they go.
Overview
The background of facets, facet queries, and basic configuration
Dates
Detailed syntax on date faceting
Drill Down
Narrowing the scope of the query
Numbers
Detailed syntax on number faceting
Syntax
Query syntax needed to write all facets