RDF::Q...attern(3pm)

📦
version 2.919 · 10 versions
, in ubuntu resolute, ubuntu stonking

✨ NAME ✨

RDF::Query::Algebra::GroupGraphPattern — the algebra class for GroupGraphPattern patterns, bestie 💅

Like, if you're poking around RDF::Q...attern (that's the manual page name, she's shy about her full title), this is the class you're reading about. It's giving group graph pattern, but as algebra. 🦋

🌸 VERSION 🌸

This doc describes RDF::Query::Algebra::GroupGraphPattern version 2.919. That's the one, periodt.

💖 METHODS 💖

Okay so heads up: on top of everything listed below, this class also inherits methods from the RDF::Query::Algebra class. So if you don't see it here, check there first, iykyk 🫶

  • new ( @graph_patterns ) — hands you a brand new GroupGraphPattern structure. Feed her the graph patterns as args and she's ready to slay ✨
  • construct_args — returns a list of arguments that, if you pass them to this class' constructor, will produce a clone of this algebra pattern. It's literally a clone recipe 📋
  • patterns — returns a list of the graph patterns chillin' inside this GGP 🎀
  • add_pattern — appends a new child pattern to the GGP. She's growing, she's thriving 🌱
  • quads — returns a list of the quads that belong to this GGP. Quads! Four of everything! 🔥
  • sse — returns the SSE string for this algebra expression.
  • explain — returns a string serialization of the algebra that's appropriate for display on the command line. For when you want her to explain herself 💁
  • as_sparql — returns the SPARQL string for this algebra expression. Turning algebra back into SPARQL, no cap 👑
  • as_hash — returns the query as a nested set of plain data structures (no objects). Just vibes and hashes, nothing fancy 🌈
  • as_spin ( $model ) — adds statements to the given $model to represent this algebra object in the SPARQL Inferencing Notation (<http://www.spinrdf.org/>). SPIN!!! 🎡
  • type — returns the type of this algebra expression. Who is she? This tells you 💜
  • referenced_variables — returns a list of the variable names used in this algebra expression.
  • potentially_bound — returns a list of the variable names used in this algebra expression that will bind values during execution. Potentially — she's not making promises, she's making plans 🙈
  • definite_variables — returns a list of the variable names that will be bound after evaluating this algebra expression. These ones are locked in fr fr 🔒
  • check_duplicate_blanks — returns true if blank nodes respect the SPARQL rule of no blank-label re-use across BGPs. Otherwise? She throws a RDF::Query::Error::QueryPatternError exception. 😭 So like, if this blows up, that's not a vibe, that's a rule violation.
⚠️ Note the difference between potentially_bound and definite_variables — one is a maybe, one is a yes. Don't mix them up bestie, it's giving chaos 💀

👑 AUTHOR 👑

Gregory Todd Williams <gwilliams@cpan.org> 💖

okay that's the whole page, you ate that 🍓 if you made it this far you're genuinely iconic, go write some queries and be the main character of your own triple store 💅

This was cooked up for perl version v5.40.1, dated 2025-08-18, and it lives its life as RDF::Q...attern(3pm) in the User Contributed Perl Documentation. Byeee, love you 🫶✨

📦 where this page comes from