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config | ||
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LICENSE.md | ||
mix.exs | ||
README.md |
RDF.ex Core
An implementation of the RDF and the basic accompanied standards for Elixir.
Installation
The Hex package can be installed as usual:
- Add
rdf_core
to your list of dependencies inmix.exs
:
```elixir
def deps do
[{:rdf_core, "~> 0.1.0"}]
end
```
- Ensure
rdf_core
is started before your application:
```elixir
def application do
[applications: [:rdf_core]]
end
```
Introduction
The RDF standard defines a Graph data model for distributed information on the web. A RDF graph is a set of RDF triples, consistenting of a three nodes:
- a subject node with an IRI or a blank node,
- a predicate node with the IRI of a RDF property,
- an object nodes with an IRI, a blank node or a RDF literal value.
Let's start examining how the different types of nodes - the RDF standards also calls them RDF terms - are represented in Elixir.
Nodes
Literals
URIs
Although the RDF standards speaks of IRIs, an internationalized generalization of URIs, RDF.ex currently supports only URIs. They are represented by Elixirs builtin URI
struct.
The RDF
module defines a handy generator function RDF.uri
RDF.uri("http://www.example.com/foo")
Besides being shorter than URI.parse
, it will provide a gentlier migration, if we decide to switch to a dedicated, more optimized URI-representation for RDF.ex.
Vocabularies
But rather than having to pass a fully qualified URI string to RDF.uri
, it allows for something similar to QNames of XML.
Blank nodes
Triples
Graphs and Descriptions
Serializations
Repositories
Getting help
- Hex
- Slack
Development
Contributing
see CONTRIBUTING for details.
License and Copyright
(c) 2016 Marcel Otto. MIT Licensed, see LICENSE for details.