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## Uses of Package
org.apache.lucene.search.join

Classes in org.apache.lucene.search.join used by org.apache.lucene.search.join
ScoreMode How to aggregate multiple child hit scores into a single parent score.
ToChildBlockJoinQuery Just like `ToParentBlockJoinQuery`, except this query joins in reverse: you provide a Query matching parent documents and it joins down to child documents.
ToParentBlockJoinFieldComparator A field comparator that allows parent documents to be sorted by fields from the nested / child documents.
ToParentBlockJoinQuery This query requires that you index children and parent docs as a single block, using the `IndexWriter.addDocuments()` or `IndexWriter.updateDocuments()` API.

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