NAME

AtteanX::Parser::SPARQL - SPARQL 1.1 Parser.

VERSION

This document describes AtteanX::Parser::SPARQL version 0.023.

SYNOPSIS

 use AtteanX::Parser::SPARQL;
 my $algbrea = AtteanX::Parser::SPARQL->parse($sparql, $base_uri);
 # or:
 my $parser     = AtteanX::Parser::SPARQL->new();
 my ($algebra) = $parser->parse_list_from_bytes($sparql, $base_uri);
 
 # or to allow parsing of SPARQL 1.1 Updates:
 
 my $algbrea = AtteanX::Parser::SPARQL->parse_update($sparql, $base_uri);
 # or:
 my $parser = AtteanX::Parser::SPARQL->new(update => 1);
 my ($algebra) = $parser->parse_list_from_bytes($sparql, $base_uri);
 

DESCRIPTION

This module implements a recursive-descent parser for SPARQL 1.1 using the AtteanX::Parser::SPARQLLex tokenizer. Successful parsing results in an object whose type is one of: Attean::Algebra::Query, Attean::Algebra::Update, or Attean::Algebra::Sequence.

ROLES

This class consumes Attean::API::Parser, Attean::API::AtOnceParser, and Attean::API::AbbreviatingParser.

ATTRIBUTES

canonical_media_type
media_types
file_extensions
handled_type
lexer
args
build
update
namespaces
baseURI
filters

METHODS

parse ( $sparql )

Parse the $sparql query string and return the resulting Attean::API::Algebra object.

parse_update ( $sparql )

Parse the $sparql update string and return the resulting Attean::API::Algebra object.

parse_list_from_io( $fh )
parse_list_from_bytes( $bytes )
parse_nodes ( $string )

Returns a list of Attean::API::Term or Attean::API::Variable objects, parsed in SPARQL syntax from the supplied $string. Parsing is ended either upon seeing a DOT, or reaching the end of the string.

error

Returns the error encountered during the last parse.

new_binary_expression ( $operator, @operands )

Returns a new binary expression structure.

new_function_expression ( $function, @operands )

Returns a new function expression structure.

BUGS

Please report any bugs or feature requests to through the GitHub web interface at https://github.com/kasei/attean/issues.

SEE ALSO

AUTHOR

Gregory Todd Williams <gwilliams@cpan.org>

COPYRIGHT

Copyright (c) 2014--2019 Gregory Todd Williams. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.