Gregory Todd Williams > RDF-Query > RDF::Query::Util

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Module Version: 2.911   Source  

NAME ^

RDF::Query::Util - Miscellaneous utility functions to support work with RDF::Query.

VERSION ^

This document describes RDF::Query::Util version 2.911.

SYNOPSIS ^

 use RDF::Query::Util;
 my $query = &RDF::Query::Util::cli_make_query;
 my $model = &RDF::Query::Util::cli_make_model;
 $query->execute( $model );
 ...

FUNCTIONS ^

cli_make_query_and_model

Returns a query object, model, and args HASHref based on the arguments in @ARGV. These arguments are parsed using cli_make_query and make_model.

cli_make_query

Returns a RDF::Query object based on the arguments in @ARGV. These arguments are parsed using &cli_parse_args. If the -e flag is not present, the query will be loaded from a file named by the argument in @ARGV immediately following the final argument parsed by &cli_parse_args.

cli_make_model

Calls make_model with arguments from @ARGV, returning the constructed model object.

cli_make_model will usually be called after cli_make_query, allowing a typical CLI invocation to look like `prog.pl [flags] [query file] [data files]`.

make_model ( @files )

Returns a model object suitable for use in a call to $query->execute, loaded with RDF from files and/or URLs listed in @files. This model may be any of the supported models, but as currently implemented will be a RDF::Trine::Model object.

cli_parse_args

Parses CLI arguments from @ARGV and returns a HASH with the recognized key/values. The allowable arguments are listed below.

start_endpoint ( $model, $port )

Starts an SPARQL endpoint HTTP server on port $port.

If called in list context, returns the PID and the actual port the server bound to. If called in scalar context, returns only the port.

COMMAND LINE ARGUMENTS ^

-e str

Specifies the query string str.

-l lang

Specifies the query language lang used. This should be one of: sparql, sparql11, or rdql.

-O

Turns on optimization.

-o

Turns off optimization.

-c class

Specifies the perl class used to construct the query object. Defaults to RDF::Query.

-f

Implies -c RDF::Query::Federate.

-F loc

Specifies the URL or path to a file loc which contains an RDF service description. The described service is used as an underlying triplestore for query answering. Implies -f.

-E url

Specifies the URL of a remove SPARQL endpoint to be used as a data source. The endpoint is used as an underlying triplestore for query answering. Implies -f.

-s database-type

Specifies the database type to use for the underlying data model.

-u user
-p password
-m model

AUTHOR ^

 Gregory Todd Williams <gwilliams@cpan.org>
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