View Source RDF (RDF.ex v1.2.0)
The top-level module of RDF.ex.
RDF.ex consists of:
- structs for the nodes of an RDF graph
- various modules making working with the nodes of an RDF graph easier
- the
RDF.Literal.Datatypesystem - a facility for the mapping of URIs of a vocabulary to Elixir modules and
functions:
RDF.Vocabulary.Namespace - a facility for the automatic generation of resource identifiers:
RDF.Resource.Generator - modules for the construction of statements
- structs for collections of statements
- functions to construct and execute basic graph pattern queries:
RDF.Query - functions for working with RDF serializations:
RDF.Serialization - behaviours for the definition of RDF serialization formats
- and the implementation of various RDF serialization formats
This top-level module provides shortcut functions for the construction of the basic elements and structures of RDF and some general helper functions.
It also can be use'ed to add basic imports and aliases for working with RDF.ex
on any module. See __using__/1 for details.
For a general introduction you may refer to the guides on the homepage.
Summary
Functions
See RDF.NS.RDF.nil/0.
Adds basic imports and aliases for working with RDF.ex.
Checks if the given value is a blank node.
A user-defined RDF.PrefixMap of prefixes to IRI namespaces.
Returns the default_prefixes/0 with additional prefix mappings.
See RDF.Graph.new/0.
See RDF.IRI.new/1.
Checks if the given value is an RDF literal.
Checks if the given value is a RDF.Resource, i.e. a RDF.IRI or RDF.BlankNode.
See RDF.NS.RDF.rest/0.
A fixed set prefixes that will always be part of the default_prefixes/0.
Returns whether RDF-star support is enabled.
Checks if the given value is a RDF.Term, i.e. a RDF.IRI, RDF.BlankNode or RDF.Literal.
See RDF.NS.RDF.type/0.
See RDF.IRI.new/1.
Functions
See RDF.NS.RDF.nil/0.
Adds basic imports and aliases for working with RDF.ex.
This allows to write
use RDFinstead of the following
import RDF.Sigils
import RDF.Guards
import RDF.Namespace.IRI
require RDF.Graph
alias RDF.{XSD, NTriples, NQuads, Turtle}See RDF.BlankNode.new/0.
See RDF.BlankNode.new/1.
Checks if the given value is a blank node.
Examples
iex> RDF.bnode?(RDF.bnode)
true
iex> RDF.bnode?(RDF.iri("http://example.com/resource"))
false
iex> RDF.bnode?(42)
falseSee RDF.Dataset.new/0.
See RDF.Dataset.new/1.
See RDF.Dataset.new/2.
A user-defined RDF.PrefixMap of prefixes to IRI namespaces.
This prefix map will be used implicitly wherever a prefix map is expected, but not provided. For example, when you don't pass a prefix map to the Turtle serializer, this prefix map will be used.
By default, the standard_prefixes/0 are part of this prefix map, but you can
define additional default prefixes via the default_prefixes compile-time
configuration.
For example:
config :rdf,
default_prefixes: %{
ex: "http://example.com/"
}You can also set :default_prefixes to a module-function tuple {mod, fun}
with a function which should be called to determine the default prefixes.
If you don't want the standard_prefixes/0 to be part of the default prefixes,
or you want to map the standard prefixes to different namespaces (strongly discouraged!),
you can set the use_standard_prefixes compile-time configuration flag to false.
config :rdf,
use_standard_prefixes: falseReturns the default_prefixes/0 with additional prefix mappings.
The prefix_mappings can be given in any format accepted by RDF.PrefixMap.new/1.
See RDF.Diff.diff/2.
See RDF.NS.RDF.first/0.
See RDF.Graph.new/0.
See RDF.Graph.new/1.
See RDF.Graph.new/2.
See RDF.IRI.new/1.
See RDF.IRI.new!/1.
See RDF.IRI.valid?/1.
See RDF.LangString.new/2.
See RDF.LangString.new/2.
See RDF.List.node?/1.
See RDF.List.node?/2.
See RDF.Literal.new/1.
See RDF.Literal.new/2.
Checks if the given value is an RDF literal.
See RDF.NS.RDF.object/0.
See RDF.PrefixMap.new/1.
See RDF.PrefixMap.new/1.
See RDF.Star.Quad.new/2.
See RDF.Star.Quad.new/5.
Checks if the given value is a RDF.Resource, i.e. a RDF.IRI or RDF.BlankNode.
Examples
Supposed EX is a RDF.Vocabulary.Namespace and Foo is not.
iex> RDF.resource?(RDF.iri("http://example.com/resource"))
true
iex> RDF.resource?(EX.resource)
true
iex> RDF.resource?(EX.Resource)
true
iex> RDF.resource?(Foo.Resource)
false
iex> RDF.resource?(RDF.bnode)
true
iex> RDF.resource?(RDF.XSD.integer(42))
false
iex> RDF.resource?(42)
falseSee RDF.NS.RDF.rest/0.
A fixed set prefixes that will always be part of the default_prefixes/0.
RDF.PrefixMap.new(%{
:rdf => ~I<http://www.w3.org/1999/02/22-rdf-syntax-ns#>,
:rdfs => ~I<http://www.w3.org/2000/01/rdf-schema#>,
:xsd => ~I<http://www.w3.org/2001/XMLSchema#>
})See default_prefixes/0, if you don't want these standard prefixes to be part
of the default prefixes.
Returns whether RDF-star support is enabled.
See RDF.NS.RDF.subject/0.
Checks if the given value is a RDF.Term, i.e. a RDF.IRI, RDF.BlankNode or RDF.Literal.
Examples
Supposed EX is a RDF.Vocabulary.Namespace and Foo is not.
iex> RDF.term?(RDF.iri("http://example.com/resource"))
true
iex> RDF.term?(EX.resource)
true
iex> RDF.term?(EX.Resource)
true
iex> RDF.term?(Foo.Resource)
false
iex> RDF.term?(RDF.bnode)
true
iex> RDF.term?(RDF.XSD.integer(42))
true
iex> RDF.term?(42)
falseSee RDF.NS.RDF.type/0.
See RDF.IRI.new/1.
See RDF.IRI.new!/1.
See RDF.IRI.valid?/1.
See RDF.NS.RDF.value/0.