diff options
| -rw-r--r-- | doc/src/sgml/textsearch.sgml | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/doc/src/sgml/textsearch.sgml b/doc/src/sgml/textsearch.sgml index 9e78286bb59..fd54c4425dc 100644 --- a/doc/src/sgml/textsearch.sgml +++ b/doc/src/sgml/textsearch.sgml @@ -885,7 +885,9 @@ SELECT plainto_tsquery('english', 'The Fat & Rats:C'); ranking for the given document vector and query, as described in Clarke, Cormack, and Tudhope's "Relevance Ranking for One to Three Term Queries" in the journal "Information Processing and Management", - 1999. + 1999. Cover density is similar to <function>ts_rank</> ranking + except that the proximity of matching lexemes to each other is + taken into consideration. </para> <para> |