Apache Solr Reference Guide Covering Apache Solr 6.0

and exclude those filters when faceting on doctype.
q=mainquery&fq=status:public&fq={!tag=dt}doctype:pdf&facet=true&facet.fie
ld={!ex=dt}doctype
Filter exclusion is supported for all types of facets. Both the tag and ex local parameters may specify
multiple values by separating them with commas.
Changing the Output Key
To change the output key for a faceting command, specify a new name with the key local parameter. For
example:
facet.field={!ex=dt key=mylabel}doctype
The parameter setting above causes the field facet results for the "doctype" field to be returned using the key
"mylabel" rather than "doctype" in the response. This can be helpful when faceting on the same field multiple
times with different exclusions.
Related Topics
SimpleFacetParameters from the Solr Wiki.
Heatmap Faceting (Spatial)
BlockJoin Faceting
It's a common requirement to aggregate children facet counts by their parents, i.e., if a parent document has
several children documents, all of them need to increment facet value count only once. This functionality is
provided by two search components with slightly different performance: the BlockJoinFacetComponent, and
the BlockJoinDocSetFacetComponent.
These components are considered experimental, and must be explicitly enabled for a request handler in solrco
nfig.xml, in the same way as any other search component.
This example shows how you could add both search components to solrconfig.xml and define them in two
different request handlers:
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