Adds triples to a RDF.Graph.

Note: When the statements to be added are given as another RDF.Graph, the graph name must not match graph name of the graph to which the statements are added. As opposed to that RDF.Data.merge/2 will produce a RDF.Dataset containing both graphs.

Adds triples to a RDF.Graph.

Deletes statements from a RDF.Graph.

Note: When the statements to be deleted are given as another RDF.Graph, the graph name must not match graph name of the graph from which the statements are deleted. If you want to delete only graphs with matching names, you can use RDF.Data.delete/2.

Deletes statements from a RDF.Graph.

Deletes all statements with the given subjects.

Checks if a RDF.Graph contains statements about the given resource.

Examples

iex> RDF.Graph.new([{EX.S1, EX.p1, EX.O1}]) |> RDF.Graph.describes?(EX.S1)
  true
  iex> RDF.Graph.new([{EX.S1, EX.p1, EX.O1}]) |> RDF.Graph.describes?(EX.S2)
  false

The RDF.Description of the given subject.

All RDF.Descriptions within a RDF.Graph.

Fetches the description of the given subject.

When the subject can not be found :error is returned.

Examples

iex> RDF.Graph.new([{EX.S1, EX.P1, EX.O1}, {EX.S2, EX.P2, EX.O2}]) |>
...>   RDF.Graph.fetch(EX.S1)
{:ok, RDF.Description.new({EX.S1, EX.P1, EX.O1})}
iex> RDF.Graph.fetch(RDF.Graph.new, EX.foo)
:error

Gets the description of the given subject.

When the subject can not be found the optionally given default value or nil is returned.

Examples

iex> RDF.Graph.new([{EX.S1, EX.P1, EX.O1}, {EX.S2, EX.P2, EX.O2}]) |>
...>   RDF.Graph.get(EX.S1)
RDF.Description.new({EX.S1, EX.P1, EX.O1})
iex> RDF.Graph.get(RDF.Graph.new, EX.Foo)
nil
iex> RDF.Graph.get(RDF.Graph.new, EX.Foo, :bar)
:bar

Gets and updates the description of the given subject, in a single pass.

Invokes the passed function on the RDF.Description of the given subject; this function should return either {description_to_return, new_description} or :pop.

If the passed function returns {description_to_return, new_description}, the return value of get_and_update is {description_to_return, new_graph} where new_graph is the input Graph updated with new_description for the given subject.

If the passed function returns :pop the description for the given subject is removed and a {removed_description, new_graph} tuple gets returned.

Examples

iex> RDF.Graph.new({EX.S, EX.P, EX.O}) |>
...>   RDF.Graph.get_and_update(EX.S, fn current_description ->
...>     {current_description, {EX.P, EX.NEW}}
...>   end)
{RDF.Description.new(EX.S, EX.P, EX.O), RDF.Graph.new(EX.S, EX.P, EX.NEW)}

Checks if the given statement exists within a RDF.Graph.

Creates an empty unnamed RDF.Graph.

Creates an empty named RDF.Graph.

Creates a named RDF.Graph from another RDF.Graph.

Creates an unnamed RDF.Graph with initial triples.

Creates a named RDF.Graph with initial triples.

The set of all resources used in the objects within a RDF.Graph.

Note: This function does collect only IRIs and BlankNodes, not Literals.

Examples

iex> RDF.Graph.new([
...>   {EX.S1, EX.p1, EX.O1},
...>   {EX.S2, EX.p2, EX.O2},
...>   {EX.S3, EX.p1, EX.O2},
...>   {EX.S4, EX.p2, RDF.bnode(:bnode)},
...>   {EX.S5, EX.p3, "foo"}
...> ]) |> RDF.Graph.objects
MapSet.new([RDF.iri(EX.O1), RDF.iri(EX.O2), RDF.bnode(:bnode)])

Pops an arbitrary triple from a RDF.Graph.

Pops the description of the given subject.

When the subject can not be found the optionally given default value or nil is returned.

Examples

iex> RDF.Graph.new([{EX.S1, EX.P1, EX.O1}, {EX.S2, EX.P2, EX.O2}]) |>
...>   RDF.Graph.pop(EX.S1)
{RDF.Description.new({EX.S1, EX.P1, EX.O1}), RDF.Graph.new({EX.S2, EX.P2, EX.O2})}
iex> RDF.Graph.pop(RDF.Graph.new({EX.S, EX.P, EX.O}), EX.Missing)
{nil, RDF.Graph.new({EX.S, EX.P, EX.O})}

The set of all properties used in the predicates of the statements within a RDF.Graph.

Examples

iex> RDF.Graph.new([
...>   {EX.S1, EX.p1, EX.O1},
...>   {EX.S2, EX.p2, EX.O2},
...>   {EX.S1, EX.p2, EX.O3}]) |>
...>   RDF.Graph.predicates
MapSet.new([EX.p1, EX.p2])

Adds statements to a RDF.Graph and overwrites all existing statements with the same subjects and predicates.

Examples

iex> RDF.Graph.new([{EX.S1, EX.P1, EX.O1}, {EX.S2, EX.P2, EX.O2}]) |>
...>   RDF.Graph.put([{EX.S1, EX.P2, EX.O3}, {EX.S2, EX.P2, EX.O3}])
RDF.Graph.new([{EX.S1, EX.P1, EX.O1}, {EX.S1, EX.P2, EX.O3}, {EX.S2, EX.P2, EX.O3}])

Add statements to a RDF.Graph, overwriting all statements with the same subject and predicate.

Add statements to a RDF.Graph, overwriting all statements with the same subject and predicate.

Examples

iex> RDF.Graph.new(EX.S, EX.P, EX.O1) |> RDF.Graph.put(EX.S, EX.P, EX.O2)
RDF.Graph.new(EX.S, EX.P, EX.O2)
iex> RDF.Graph.new(EX.S, EX.P1, EX.O1) |> RDF.Graph.put(EX.S, EX.P2, EX.O2)
RDF.Graph.new([{EX.S, EX.P1, EX.O1}, {EX.S, EX.P2, EX.O2}])

The set of all resources used within a RDF.Graph.

Examples

iex> RDF.Graph.new([ …> {EX.S1, EX.p1, EX.O1}, …> {EX.S2, EX.p1, EX.O2}, …> {EX.S2, EX.p2, RDF.bnode(:bnode)}, …> {EX.S3, EX.p1, “foo”} …> ]) |> RDF.Graph.resources MapSet.new([RDF.iri(EX.S1), RDF.iri(EX.S2), RDF.iri(EX.S3),

RDF.iri(EX.O1), RDF.iri(EX.O2), RDF.bnode(:bnode), EX.p1, EX.p2])

The number of subjects within a RDF.Graph.

Examples

iex> RDF.Graph.new([
...>   {EX.S1, EX.p1, EX.O1},
...>   {EX.S2, EX.p2, EX.O2},
...>   {EX.S1, EX.p2, EX.O3}]) |>
...>   RDF.Graph.subject_count
2

The set of all subjects used in the statements within a RDF.Graph.

Examples

iex> RDF.Graph.new([
...>   {EX.S1, EX.p1, EX.O1},
...>   {EX.S2, EX.p2, EX.O2},
...>   {EX.S1, EX.p2, EX.O3}]) |>
...>   RDF.Graph.subjects
MapSet.new([RDF.iri(EX.S1), RDF.iri(EX.S2)])

The number of statements within a RDF.Graph.

Examples

iex> RDF.Graph.new([
...>   {EX.S1, EX.p1, EX.O1},
...>   {EX.S2, EX.p2, EX.O2},
...>   {EX.S1, EX.p2, EX.O3}]) |>
...>   RDF.Graph.triple_count
3

The list of all statements within a RDF.Graph.

Examples

iex> RDF.Graph.new([
  ...>   {EX.S1, EX.p1, EX.O1},
  ...>   {EX.S2, EX.p2, EX.O2},
  ...>   {EX.S1, EX.p2, EX.O3}
  ...> ]) |> RDF.Graph.triples
  [{RDF.iri(EX.S1), RDF.iri(EX.p1), RDF.iri(EX.O1)},
   {RDF.iri(EX.S1), RDF.iri(EX.p2), RDF.iri(EX.O3)},
   {RDF.iri(EX.S2), RDF.iri(EX.p2), RDF.iri(EX.O2)}]