defmodule RDF.Quad do @moduledoc """ Defines a RDF Quad. A Quad is a plain Elixir tuple consisting of four valid RDF values for subject, predicate, object and a graph context. """ alias RDF.{BlankNode, Statement} @doc """ Creates a `RDF.Quad` with proper RDF values. An error is raised when the given elements are not convertible to RDF values. Note: The `RDF.quad` function is a shortcut to this function. # Examples iex> RDF.Quad.new("http://example.com/S", "http://example.com/p", 42, "http://example.com/Graph") {~I, ~I, RDF.literal(42), ~I} """ def new(subject, predicate, object, graph_context) do { Statement.convert_subject(subject), Statement.convert_predicate(predicate), Statement.convert_object(object), Statement.convert_graph_name(graph_context) } end @doc """ Creates a `RDF.Quad` with proper RDF values. An error is raised when the given elements are not convertible to RDF values. Note: The `RDF.quad` function is a shortcut to this function. # Examples iex> RDF.Quad.new {"http://example.com/S", "http://example.com/p", 42, "http://example.com/Graph"} {~I, ~I, RDF.literal(42), ~I} """ def new({subject, predicate, object, graph_context}), do: new(subject, predicate, object, graph_context) end