Editing New Features in EPrints 3.3 (section)

===Search engine plugins===

Searches are now executed through the plugins layer with a new ''Search'' plugin type. EPrints 3.3 comes with support for one new search engine: Xapian. [http://www.xapian.org/download Xapian] is a probabilistic search engine that supports boolean queries. To use Xapian you must install the appropriate version of [http://search.cpan.org/search?query=search+xapian&mode=all Search::Xapian Perl library] and perform a full re-index. The Xapian index will be written to archives/[repoid]/var/xapian/.

The (default) Internal search engine plugin has support for prefixed terms in simple search e.g. "title:(american eagle) birds". This allows users to specify more complex search queries in a similar fashion to e.g. Google. The available prefixes are based on the field id listed in the simple search configuration.