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  • Marco Shimomoto thinks this is interesting:

Lucene's core concepts are as follows:

  • Document: This is the main structure used both for searches and indexes. A document is an in-memory representation of the data values we need to use for our searches. In order for this to work, every document resource consists of a collection of fields, which is the most simple data structure.
  • Field: This has its own name and value and consists of at least one term. So every document can be seen as...

From

Cover of Apache Solr Beginner's Guide

Note

Lucene conceptual elements