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.\"
.IX Title "Text::Query::ParseAdvanced 3"
.TH Text::Query::ParseAdvanced 3 "2020-07-07" "perl v5.32.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Text::Query::ParseAdvanced \- Parse AltaVista advanced query syntax
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 5
\&  use Text::Query;
\&  my $q=new Text::Query(\*(Aqhello and world\*(Aq,
\&                        \-parse => \*(AqText::Query::ParseAdvanced\*(Aq,
\&                        \-solve => \*(AqText::Query::SolveAdvancedString\*(Aq,
\&                        \-build => \*(AqText::Query::BuildAdvancedString\*(Aq);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This module provides an object that parses a string  
containing a Boolean query expression similar to an AltaVista \*(L"advanced 
query\*(R".
.PP
It's base class is Text::Query::Parse;
.PP
Query expressions consist of literal strings (or regexps) joined by the 
following operators, in order of precedence from lowest to highest:
.IP "\s-1OR,\s0 |" 4
.IX Item "OR, |"
.PD 0
.IP "\s-1AND, &\s0" 4
.IX Item "AND, &"
.IP "\s-1NEAR,\s0 ~" 4
.IX Item "NEAR, ~"
.IP "\s-1NOT,\s0 !" 4
.IX Item "NOT, !"
.PD
.PP
Operator names are not case-sensitive.  Note that if you want to use a \f(CW\*(C`|\*(C'\fR 
in a regexp, you need to backwhack it to keep it from being seen as a query 
operator.  Sub-expressions may be quoted in single or double quotes to 
match \*(L"and,\*(R" \*(L"or,\*(R" or \*(L"not\*(R" literally and may be grouped in parentheses 
(\f(CW\*(C`(, )\*(C'\fR) to alter the precedence of evaluation.
.PP
A parenthesized sub-expression may also be concatenated with other sub\- 
expressions to match sequences: \f(CW\*(C`(Perl or Python) interpreter\*(C'\fR would match 
either \*(L"Perl interpreter\*(R" or \*(L"Python interpreter\*(R".  Concatenation has a 
precedence higher than \s-1NOT\s0 but lower than \s-1AND.\s0  Juxtaposition of 
simple words has the highest precedence of all.
.SH "OPTIONS"
.IX Header "OPTIONS"
These are the additional options of the \f(CW\*(C`prepare\*(C'\fR method and the constructor.
.IP "\-near defaults to 10" 4
.IX Item "-near defaults to 10"
Sets the number of words that can occur between two expressions 
and still satisfy the \s-1NEAR\s0 operator.
.IP "\-operators defaults to and, or, not, near" 4
.IX Item "-operators defaults to and, or, not, near"
Sets the operator names. The argument of the option is a pointer to a
hash table mapping the default names to desired names. For instance:
.Sp
.Vb 6
\&    {
\&        \*(Aqor\*(Aq => \*(Aqou\*(Aq,
\&        \*(Aqand\*(Aq => \*(Aqet\*(Aq,
\&        \*(Aqnear\*(Aq => \*(Aqproche\*(Aq,
\&        \*(Aqnot\*(Aq => \*(Aqnon\*(Aq,
\&    }
.Ve
.IP "\-scope_map default to {}" 4
.IX Item "-scope_map default to {}"
Map the scope names to other names. If a scope is specified as \f(CW\*(C`scope:\*(C'\fR
search the map for an entry whose key is \f(CW\*(C`scope\*(C'\fR and replace \f(CW\*(C`scope\*(C'\fR with
the scalar found. For instance:
.Sp
.Vb 3
\&     {
\&         \*(Aqscope\*(Aq => \*(Aqotherscope\*(Aq
\&     }
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBText::Query\fR\|(3)
\&\fBText::Query::Parse\fR\|(3)
.SH "AUTHORS"
.IX Header "AUTHORS"
Eric Bohlman (ebohlman@netcom.com)
.PP
Loic Dachary (loic@senga.org)
.PP
Jon Jensen, jon@endpoint.com