File: msearch-cmdref-casefolding.html

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><H1
><A
NAME="cmdref-casefolding"
></A
>CaseFolding</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN4712"
></A
><H2
>Name</H2
>CaseFolding&nbsp;--&nbsp;choose alternative case mapping<P
><B
></B
><SPAN
CLASS="application"
>indexer.conf</SPAN
>
  <SPAN
CLASS="application"
>search.htm</SPAN
></P
></DIV
><DIV
CLASS="refsynopsisdiv"
><A
NAME="AEN4718"
></A
><H2
>Synopsis</H2
><P
><B
CLASS="command"
>CaseFolding</B
>  {default | turkish | turkish2}</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN4725"
></A
><H2
>Description</H2
><P
>When storing word information to the database,
<SPAN
CLASS="application"
>indexer</SPAN
> converts the words
to lower case. Some languages can have special rules
for case mapping.

With <B
CLASS="command"
>CaseFolding</B
> set to <TT
CLASS="literal"
>turkish</TT
>,
<SPAN
CLASS="application"
>indexer</SPAN
>
applies special rules when converting to lower case:
<TT
CLASS="literal"
>U+0049 LATIN CAPITAL LETTER I</TT
> is
mapped to <TT
CLASS="literal"
>U+0131 LATIN SMALL LETTER DOTLESS I</TT
>,
and <TT
CLASS="literal"
>U+0130 LATIN CAPITAL LETTER I WITH DOT ABOVE</TT
>
is mapped to <TT
CLASS="literal"
>U+0069 LATIN SMALL LETTER I</TT
>,
which is suitable for  Turkish and Azerbaijani languages.
</P
><P
>&#13;With <B
CLASS="command"
>CaseFolding</B
> set to <TT
CLASS="literal"
>turkish2</TT
>,
the letters <TT
CLASS="literal"
>U+0049 LATIN CAPITAL LETTER I</TT
>,
<TT
CLASS="literal"
>U+0130 LATIN CAPITAL LETTER I WITH DOT ABOVE</TT
> and
<TT
CLASS="literal"
>U+0131 LATIN SMALL LETTER DOTLESS I</TT
>
are mapped to <TT
CLASS="literal"
>U+0069 LATIN SMALL LETTER I</TT
>.
which is suitable for indexing Turkish and English sites
at the same time.
</P
><P
>&#13;With <B
CLASS="command"
>CaseFolding</B
> set to <TT
CLASS="literal"
>default</TT
>,
<SPAN
CLASS="application"
>indexer</SPAN
> applies "traditional"
lower case mapping rules, i.e.
<TT
CLASS="literal"
>U+0049 LATIN CAPITAL LETTER I</TT
> is
mapped to <TT
CLASS="literal"
>U+0069 LATIN SMALL LETTER I</TT
>,
while <TT
CLASS="literal"
>U+0130 LATIN CAPITAL LETTER I WITH DOT ABOVE</TT
>
doesn't change.
</P
><P
>&#13;<DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>
<TT
CLASS="filename"
>indexer.conf</TT
> and 
<TT
CLASS="filename"
>search.htm</TT
> should set
<B
CLASS="command"
>CaseFolding</B
> to the same value.
</P
></BLOCKQUOTE
></DIV
>
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN4756"
></A
><H2
>Examples</H2
><DIV
CLASS="informalexample"
><P
></P
><A
NAME="AEN4758"
></A
><PRE
CLASS="programlisting"
>&#13;CaseFolding turkish
</PRE
><P
></P
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