<chapter id="administration">
- <!-- $Id: administration.xml,v 1.30 2006-05-01 12:59:33 marc Exp $ -->
+ <!-- $Id: administration.xml,v 1.31 2006-05-01 13:07:40 marc Exp $ -->
<title>Administrating Zebra</title>
<!-- ### It's a bit daft that this chapter (which describes half of
the configuration-file formats) is separated from
<para>
There are cases, however, where relevance of hit set documents is
- hghly dependent on the query processed.
+ highly dependent on the query processed.
Simply put, <literal>dynamic relevance ranking</literal>
sortes a set of retrieved
records such
TF-IDF (Term Frequecy over Inverse Document Frequency) like algorithm.
</para>
+ <warning>
+ <para>
+ Notice that <literal>dynamic ranking</literal> is not compatible
+ with <literal>estimated hit sizes</literal>, as all documents in
+ a hit set must be acessed to compute the correct placing in a
+ ranking sorted list. Therefore the use attribute setting
+ <literal>@attr 2=102</literal> clashes with
+ <literal>@attr 9=</literal>.
+ </para>
+ </warning>
+
<para>
It is possible to apply dynamic ranking on parts of the PQF query
allone: