Editing EPrints Glossary (section)

== X ==
=== Xapian search ===
Originally [[#EPrints repository software|EPrints repository software]] created its own database index to support search.  However, this was not particularly efficient or quick to return results, so it started to use a [https://xapian.org/ Xapian] search index to speed up [[#Simple search|simple search]].  ([[#Advanced search|Advanced search]] still uses the database index).  Also, it made it possible to provide relevance based ordering, so that more relevant results could be displayed nearer the top of the search results.  Xapian also gives the potential to provide faceted based search, where search results can be refined by limiting the values for a particular facet (i.e. for EPrints, a [[#Metadata field|metadata field]]).