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L<Syntax::Highlight::Perl|Syntax::Highlight::Perl> currently recognizes.

For each style there is a correspondant syntactical element. The elements are:

=over 4

=item Comment_Normal 

Default is C<{color:#006699;font-style:italic;}>

=item Comment_POD 

Default is C<{color:#001144;font-family:garamond,serif;font-size:11pt;font-style:italic;}>

=item Directive 

Default is C<{color:#339999;font-style:italic;}>

=item Label

Default is C<{color:#993399;font-style:italic;}>

=item Quote 

Default is C<{color:#0000aa;}>

=item String

Default is C<{color:#0000aa;}>

=item Subroutine 

Default is C<{color:#998800;}>

=item Variable_Scalar

Default is C<{color:#008800;}>

=item Variable_Array 

Default is C<{color:#ff7700;}>

=item Variable_Hash 

Default is C<{color:#8800ff;}>

=item Variable_Typeglob 

Default is C<{color:#ff0033;}>

=item Whitespace

Not yet used

=item Character

Default is C<{color:#880000;}>

=item Keyword 

Default is C<{color:#000000; font-weight:bold;}>

=item Builtin_Function 

Default is C<{color:#000000; font-weight:bold;}>

=item Builtin_Operator 

Default is C<{color:#000000; font-weight:bold;}>

=item Operator

Default is C<{color:#000000;}>

=item Bareword 

Default is C<{color:#33AA33;}>

=item Package

Default is C<{color:#990000;}>

=item Number

Default is C<{color:#ff00ff;}>

=item Symbol

Default is C<{color:#000000;}>

=item CodeTerm 

Default is C<{color:#AA0000;}>

=item DATA

Default is C<{color:#CCCCCC;}>

=item LineNumber 

This style hasn't a correspondant syntactical element but is used to display
line numbers to the right of the code. Default is C<{color:#CCCCCC;}>

=back

See C<FORMAT TYPES> section of
L<Syntax::Highlight::Perl|Syntax::Highlight::Perl> POD for more informations
about elements currently recognized.

=item C<HighlightShowLineNumbers> On|Off

This single directive displays line numbers to the right of the text

   PerlSetVar HighlightShowLineNumbers On

It can be placed in server config, <VirtualHost>, <Directory>, <Location>,
<Files> and F<.htaccess> context. The default value is C<Off>.

=item C<HighlightCache> On|Off

This directive enables a very simple cache layer of already and unchanged
highlighted files:

   PerlSetVar HighlightCache On

Default is C<Off>.

=item C<HighlightCacheDir> string