/ 
RDF-Query-Functions-Buzzword-Util-0.003
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/ RDF::Query::Functions::Buzzword::Util

NAME

RDF::Query::Functions::Buzzword::Util - plugin for buzzword.org.uk utility functions

SYNOPSIS

use RDF::TrineX::Functions -shortcuts;

my $data = rdf_parse(<<'TURTLE', type => 'turtle', base => $base_uri);
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .

<http://tobyinkster.co.uk/#i>
  foaf:name "Toby Inkster" ;
  foaf:page [ foaf:name "Toby Inkster" ] ;
  foaf:junk "Foo <ex xmlns=\"urn:junk\">Bar</ex>"^^rdf:XMLLiteral ;
  foaf:mbox <mailto:tobyink@cpan.org> .
TURTLE

my $query = RDF::Query->new(<<'SPARQL');
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX util: <http://buzzword.org.uk/2011/functions/util#>
PREFIX junk: <urn:junk> 
SELECT
  ?name
  (util:uc(?name) AS ?ucname)
  (util:trim(util:sprintf(" I am %s "@en, ?name)) AS ?intro)
  (util:skolem(?page, "oid") AS ?skolempage)
  (util:preg_replace("t", "x", ?name, "ig") AS ?mangled)
  (util:find_xpath("//junk:ex", ?junk, 0) AS ?found)
WHERE
{
  ?person foaf:name ?name ; foaf:page ?page ; foaf:junk ?junk.
}
SPARQL

print $query->execute($data)->as_xml;

DESCRIPTION

This is a plugin for RDF::Query providing a number of extension functions.

  • http://buzzword.org.uk/2011/functions/util#defragment

  • http://buzzword.org.uk/2011/functions/util#find_xpath

  • http://buzzword.org.uk/2011/functions/util#lc

  • http://buzzword.org.uk/2011/functions/util#ltrim

  • http://buzzword.org.uk/2011/functions/util#oid

  • http://buzzword.org.uk/2011/functions/util#oid_uri

  • http://buzzword.org.uk/2011/functions/util#preg_replace

  • http://buzzword.org.uk/2011/functions/util#rand

  • http://buzzword.org.uk/2011/functions/util#rtrim

  • http://buzzword.org.uk/2011/functions/util#skolem

  • http://buzzword.org.uk/2011/functions/util#sprintf

  • http://buzzword.org.uk/2011/functions/util#str_replace

  • http://buzzword.org.uk/2011/functions/util#trim

  • http://buzzword.org.uk/2011/functions/util#uc

  • http://buzzword.org.uk/2011/functions/util#uuid

  • http://buzzword.org.uk/2011/functions/util#uuid_uri

Some of these are somewhat close to new functions introduced in SPARQL 1.1.

SEE ALSO

RDF::Query.

http://www.perlrdf.org/.

AUTHOR

Toby Inkster <tobyink@cpan.org>.

COPYRIGHT

Copyright 2010-2012 Toby Inkster

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.