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Update Json facet documentation (#1857) 

Added missing preposition (to) in the sentence
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Moses Schwartz 2020-09-13 04:05:20 -04:00 committed by GitHub
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solr/solr-ref-guide/src/json-faceting-domain-changes.adoc
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@ -214,7 +214,7 @@ NOTE: While a `query` domain can be combined with an additional domain `filter`,
== Block Join Domain Changes
When a collection contains <<indexing-nested-documents.adoc#indexing-nested-documents, Nested Documents>>, the `blockChildren` or `blockParent` domain options can be used transform an existing domain containing one type of document, into a domain containing the documents with the specified relationship (child or parent of) to the documents from the original domain.
When a collection contains <<indexing-nested-documents.adoc#indexing-nested-documents, Nested Documents>>, the `blockChildren` or `blockParent` domain options can be used to transform an existing domain containing one type of document, into a domain containing the documents with the specified relationship (child or parent of) to the documents from the original domain.
Both of these options work similarly to the corresponding <<other-parsers.adoc#block-join-query-parsers,Block Join Query Parsers>> by taking in a single String query that exclusively matches all parent documents in the collection. If `blockParent` is used, then the resulting domain will contain all parent documents of the children from the original domain. If `blockChildren` is used, then the resulting domain will contain all child documents of the parents from the original domain. Quite often facets over child documents needs to be counted in parent documents, this can be done by `uniqueBlock(\_root_)` as described in <<json-facet-api#uniqueblock-and-block-join-counts, Block Join Facet Counts>>.