+ <para>
+ Following are three excerpts of the standard
+ <filename>tab/default.idx</filename> configuration file. Notice
+ that the <literal>index</literal> and <literal>sort</literal>
+ are grouping directives, which bind all other following directives
+ to them:
+ <screen>
+ # Traditional word index
+ # Used if completenss is 'incomplete field' (@attr 6=1) and
+ # structure is word/phrase/word-list/free-form-text/document-text
+ index w
+ completeness 0
+ position 1
+ alwaysmatches 1
+ firstinfield 1
+ charmap string.chr
+
+ ...
+
+ # Null map index (no mapping at all)
+ # Used if structure=key (@attr 4=3)
+ index 0
+ completeness 0
+ position 1
+ charmap @
+
+ ...
+
+ # Sort register
+ sort s
+ completeness 1
+ charmap string.chr
+ </screen>
+ </para>