1RDF::Query::Util(3)   User Contributed Perl Documentation  RDF::Query::Util(3)
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NAME

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

10       This document describes RDF::Query::Util version 2.918.
11

SYNOPSIS

13        use RDF::Query::Util;
14        my $query = &RDF::Query::Util::cli_make_query;
15        my $model = &RDF::Query::Util::cli_make_model;
16        $query->execute( $model );
17        ...
18

FUNCTIONS

20       "cli_make_query_and_model"
21           Returns a query object, model, and args HASHref based on the
22           arguments in @ARGV.  These arguments are parsed using
23           "cli_make_query" and "make_model".
24
25       "cli_make_query"
26           Returns a RDF::Query object based on the arguments in @ARGV. These
27           arguments are parsed using &cli_parse_args. If the -e flag is not
28           present, the query will be loaded from a file named by the argument
29           in @ARGV immediately following the final argument parsed by
30           &cli_parse_args.
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32       "cli_make_model"
33           Calls "make_model" with arguments from @ARGV, returning the
34           constructed model object.
35
36           "cli_make_model" will usually be called after cli_make_query,
37           allowing a typical CLI invocation to look like `prog.pl [flags]
38           [query file] [data files]`.
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40       "make_model ( @files )"
41           Returns a model object suitable for use in a call to
42           "$query->execute", loaded with RDF from files and/or URLs listed in
43           @files. This model may be any of the supported models, but as
44           currently implemented will be a RDF::Trine::Model object.
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46       "cli_parse_args"
47           Parses CLI arguments from @ARGV and returns a HASH with the
48           recognized key/values.  The allowable arguments are listed below.
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50       "start_endpoint ( $model, $port )"
51           Starts an SPARQL endpoint HTTP server on port $port.
52
53           If called in list context, returns the PID and the actual port the
54           server bound to. If called in scalar context, returns only the
55           port.
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COMMAND LINE ARGUMENTS

58       -e str
59           Specifies the query string str.
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61       -l lang
62           Specifies the query language lang used. This should be one of:
63           sparql, sparql11, or rdql.
64
65       -O  Turns on optimization.
66
67       -o  Turns off optimization.
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69       -c class
70           Specifies the perl class used to construct the query object.
71           Defaults to "RDF::Query".
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73       -f  Implies -c RDF::Query::Federate.
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75       -F loc
76           Specifies the URL or path to a file loc which contains an RDF
77           service description. The described service is used as an underlying
78           triplestore for query answering. Implies -f.
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80       -E url
81           Specifies the URL of a remove SPARQL endpoint to be used as a data
82           source. The endpoint is used as an underlying triplestore for query
83           answering. Implies -f.
84
85       -s database-type
86           Specifies the database type to use for the underlying data model.
87
88       -u user
89       -p password
90       -m model
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AUTHOR

93        Gregory Todd Williams <gwilliams@cpan.org>
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97perl v5.38.0                      2023-07-21               RDF::Query::Util(3)
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