View Source RDF.Star.Triple (RDF.ex v2.0.1)
Helper functions for RDF-star triples.
An RDF-star triple is represented as a plain Elixir tuple consisting of three valid
RDF values for subject, predicate and object.
As opposed to an RDF.Triple
the subject or object can be a triple itself.
Summary
Functions
Creates a RDF.Star.Triple
with proper RDF-star values.
Creates a RDF.Star.Triple
with proper RDF-star values.
Checks if the given tuple is a valid RDF-star triple.
Types
@type coercible() :: {RDF.Star.Statement.coercible_subject(), RDF.Star.Statement.coercible_predicate(), RDF.Star.Statement.coercible_object()}
@type t() :: {RDF.Star.Statement.subject(), RDF.Star.Statement.predicate(), RDF.Star.Statement.object()}
Functions
@spec new(RDF.Star.Statement.coercible(), RDF.PropertyMap.t() | nil) :: t()
Creates a RDF.Star.Triple
with proper RDF-star values.
An error is raised when the given elements are not coercible to RDF-star values.
Note: The RDF.triple
function is a shortcut to this function.
Examples
iex> RDF.Star.Triple.new {"http://example.com/S", "http://example.com/p", 42}
{~I<http://example.com/S>, ~I<http://example.com/p>, RDF.literal(42)}
iex> RDF.Star.Triple.new {EX.S, EX.p, 42}
{RDF.iri("http://example.com/S"), RDF.iri("http://example.com/p"), RDF.literal(42)}
iex> RDF.Star.Triple.new {EX.S, EX.p, 42, EX.Graph}
{RDF.iri("http://example.com/S"), RDF.iri("http://example.com/p"), RDF.literal(42)}
iex> RDF.Star.Triple.new {EX.S, :p, 42}, RDF.PropertyMap.new(p: EX.p)
{RDF.iri("http://example.com/S"), RDF.iri("http://example.com/p"), RDF.literal(42)}
iex> RDF.Star.Triple.new({{EX.S, :p, 42}, :p2, 43}, RDF.PropertyMap.new(p: EX.p, p2: EX.p2))
{{~I<http://example.com/S>, ~I<http://example.com/p>, RDF.literal(42)}, ~I<http://example.com/p2>, RDF.literal(43)}
@spec new( RDF.Star.Statement.coercible_subject(), RDF.Star.Statement.coercible_predicate(), RDF.Star.Statement.coercible_object(), RDF.PropertyMap.t() | nil ) :: t()
Creates a RDF.Star.Triple
with proper RDF-star values.
An error is raised when the given elements are not coercible to RDF-star values.
Note: The RDF.triple
function is a shortcut to this function.
Examples
iex> RDF.Star.Triple.new({"http://example.com/S", "http://example.com/p", 42}, "http://example.com/p2", 43)
{{~I<http://example.com/S>, ~I<http://example.com/p>, RDF.literal(42)}, ~I<http://example.com/p2>, RDF.literal(43)}
iex> RDF.Star.Triple.new({EX.S, EX.p, 42}, EX.p2, 43)
{{~I<http://example.com/S>, ~I<http://example.com/p>, RDF.literal(42)}, ~I<http://example.com/p2>, RDF.literal(43)}
iex> RDF.Star.Triple.new(EX.S, EX.p, 42)
{RDF.iri("http://example.com/S"), RDF.iri("http://example.com/p"), RDF.literal(42)}
iex> RDF.Star.Triple.new({EX.S, :p, 42}, :p2, 43, RDF.PropertyMap.new(p: EX.p, p2: EX.p2))
{{~I<http://example.com/S>, ~I<http://example.com/p>, RDF.literal(42)}, ~I<http://example.com/p2>, RDF.literal(43)}
Checks if the given tuple is a valid RDF-star triple.
The elements of a valid RDF-star triple must be RDF terms. On the subject position only IRIs, blank nodes and triples are allowed, while on the predicate position only IRIs allowed. The object position can be any RDF term or triple.