1<Directory>backends/multi</Directory> 2 3<Description> 4The MultiDatabase backend, which enables 5searches to be performed across several databases. Opening this 6database involves opening each of the sub-databases and merging 7them together. 8 9Searches are performed across the sub-databases via MultiPostList 10and MultiTermList objects, which represent merged sets of postlist 11and termlist objects. 12</Description> 13