NAME

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

VERSION

       This document describes RDF::Query::Util version 2.918.

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>