Attean...re::LDF(3pm)

💖 AtteanX::Store::LDF 💖

okay bestie, buckle up, because this is the manual page for AtteanX::Store::LDF, a Perl module (that's a 3pm page, from the User Contributed Perl Documentation corner of the universe), and it is genuinely so fun. It's a Linked Data Fragment RDF store. Yes. That's the whole vibe. Let's get into it. 🦋

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✨ NAME ✨

AtteanX::Store::LDF — a Linked Data Fragment RDF store. That's it, that's the name, she's simple, she's elegant, she serves. 💅

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🌈 SYNOPSIS 🌈

here's the whole thing, exactly as written, because copy-paste is a love language:

use v5.14;
use Attean;
use Attean::RDF qw(iri blank literal);
use AtteanX::Store::LDF;

my $uri   = 'http://fragments.dbpedia.org/2014/en';
my $store = Attean->get_store('LDF')->new(start_url => $uri);

my $iter = $store->get_triples(undef,undef,literal("Albert Einstein"));

while (my $triple = $iter->next) {
 say $triple->subject->ntriples_string .
   " " .
   $triple->predicate->ntriples_string .
   " " .
   $triple->object->ntriples_string  .
   " .";
}

like… she said "give me a store, give me a fragment URL, and I will hand you Albert Einstein." iconic behavior fr fr. 🧚

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🌸 DESCRIPTION 🌸

So. AtteanX::Store::LDF gives you a triple-store that is wired up to a Linked Data Fragment server. That's the whole concept, no notes.

Wanna learn more about Triple Pattern Fragments? The page points you at <http://linkeddatafragments.org/> and honestly bestie, go read it, it's giving educational. 📚✨

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👑 METHODS 👑

Quick heads up before we dive in: beyond the methods listed below, this class inherits methods from the Attean::API::TripleStore class. So don't come for her about missing methods, she got them from her parent, it's a whole family thing. 💜

new( start_url => $start_url )

Returns a brand-new LDF-backed storage object. 🎀

The required start_url argument is a URL pointing at any Linked Data Fragment. And the way that attribute gets coerced? Obsessed. So it can be a string, a URI object, etc. — she'll handle it, she's flexible like that. (The original doc spells it attribure, and honestly? we respect the typo, it's part of her lore. 💀)

count_triples_estimate( $subject, $predicate, $object )

Returns the count of triples</c> matching the subject, predicate and object you handed over. Numbers, but make it a triple pattern. 🔢

get_triples( $subject, $predicate, $object)

Returns a stream object of all statements matching the specified subject, predicate and object. And here's the key detail, no cap: any of the arguments may be undef to match any value. undef = "don't care, give me everything," the most relatable argument of all time. 🙈

cost_for_plan($plan)

Returns a cost estimation for a single LDF triple, based on estimates.

The cost will be in the interval 10-1000 if the supplied argument is an AtteanX::Plan::LDF::Triple, and undef otherwise. so like, either she's got a number for you or she's got nothing. a binary queen. 💅

plans_for_algebra($algebra)

Returns an empty plan, because access_plans generates the needed plans. she's not doing the work, someone else is doing the work, and that's called delegation bestie. 💖

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🔥 SEE ALSO 🔥

Attean , Attean::API::TripleStore

go read your cousins, they're lovely. 🫶

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💀 BUGS 💀

Please report any bugs or feature requests through the GitHub web interface at <https://github.com/phochste/AtteanX-Store-LDF>.

found a bug? don't suffer in silence, tell the GitHub. she wants to know. 😭

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🌟 AUTHOR 🌟

Patrick Hochstenbach "<patrick.hochstenbach@ugent.be>" and Kjetil Kjernsmo <kjetilk@cpan.org>.

legends, both of them, we stan. 👑

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🎀 COPYRIGHT 🎀

This software is copyright (c) 2015 by Patrick Hochstenbach.

This software is copyright (c) 2016 by Patrick Hochstenbach and Kjetil Kjernsmo.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. so like, go wild, but respectfully. ✨

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okay that's the whole page, you're officially educated, go fragment some linked data bestie 🦋💖

perl v5.34.0 · 2022-06-15 · Attean...re::LDF(3pm) — mwah, that's the version, the date and the page name, signing off, ily, bye!! 💅🎀🌸