rdf-ex/README.md

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<img src="rdf-logo.png" align="right" />
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# RDF.ex
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[![CI](https://github.com/rdf-elixir/rdf-ex/workflows/CI/badge.svg?branch=master)](https://github.com/rdf-elixir/rdf-ex/actions?query=branch%3Amaster+workflow%3ACI)
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[![Hex.pm](https://img.shields.io/hexpm/v/rdf.svg?style=flat-square)](https://hex.pm/packages/rdf)
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[![Hex Docs](https://img.shields.io/badge/hex-docs-lightgreen.svg)](https://hexdocs.pm/rdf/)
[![Total Download](https://img.shields.io/hexpm/dt/rdf.svg)](https://hex.pm/packages/rdf)
[![License](https://img.shields.io/hexpm/l/rdf.svg)](https://github.com/rdf-elixir/rdf-ex/blob/master/LICENSE.md)
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An implementation of the [RDF](https://www.w3.org/TR/rdf11-primer/) data model in Elixir.
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The API documentation can be found [here](https://hexdocs.pm/rdf/). For a guide and more information about RDF.ex and it's related projects, go to <https://rdf-elixir.dev>.
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Migration guides for the various versions can be found in the [Wiki](https://github.com/rdf-elixir/rdf-ex/wiki).
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## Features
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- fully compatible with the RDF 1.1 specification
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- support of the [RDF-star] extension
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- in-memory data structures for RDF descriptions, RDF graphs and RDF datasets
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- basic graph pattern matching against the in-memory data structures with streaming-support
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- execution of [SPARQL] queries against the in-memory data structures with the [SPARQL.ex] package or against any SPARQL endpoint with the [SPARQL.Client] package
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- RDF vocabularies as Elixir modules for safe, i.e. compile-time checked and concise usage of IRIs
- most of the important XML schema datatypes for RDF literals
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- support for custom datatypes for RDF literals, incl. as derivations of XSD datatypes via facets
- sigils for the most common types of nodes, i.e. IRIs, literals, blank nodes and lists
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- a DSL resembling Turtle to build RDF descriptions or full RDF graphs in Elixir
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- implementations for the [N-Triples], [N-Quads] and [Turtle] serialization formats (including the respective RDF-star extensions); [JSON-LD] and [RDF-XML] are available with the separate [JSON-LD.ex] and [RDF-XML.ex] packages
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- validation of RDF data against [ShEx] schemas with the [ShEx.ex] package
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- mapping of RDF data structures to Elixir structs and back with [Grax]
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## Contributing
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There's still much to do for a complete RDF ecosystem for Elixir, which means there are plenty of opportunities to contribute. Here are some suggestions:
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- more serialization formats, like [RDFa], [N3], [CSVW], [HDT] etc.
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- more XSD datatypes
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- improving the documentation
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See [CONTRIBUTING](CONTRIBUTING.md) for details.
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## Consulting
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If you need help with your Elixir and Linked Data projects, just contact [NinjaConcept](https://www.ninjaconcept.com/) via <contact@ninjaconcept.com>.
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## Acknowledgements
The development of this project was partly sponsored by [NetzeBW](https://www.netze-bw.de/) for [NETZlive](https://www.netze-bw.de/unsernetz/netzinnovationen/digitalisierung/netzlive).
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[JetBrains](https://www.jetbrains.com/?from=RDF.ex) supports the project with complimentary access to its development environments.
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## License and Copyright
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(c) 2017-present Marcel Otto. MIT Licensed, see [LICENSE](LICENSE.md) for details.
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[RDF.ex]: https://hex.pm/packages/rdf
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[JSON-LD.ex]: https://hex.pm/packages/json_ld
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[RDF-XML.ex]: https://hex.pm/packages/rdf_xml
[SPARQL.ex]: https://hex.pm/packages/sparql
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[SPARQL.Client]: https://hex.pm/packages/sparql_client
[ShEx.ex]: https://hex.pm/packages/shex
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[Grax]: https://hex.pm/packages/grax
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[RDF-star]: https://w3c.github.io/rdf-star/cg-spec
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[N-Triples]: https://www.w3.org/TR/n-triples/
[N-Quads]: https://www.w3.org/TR/n-quads/
[Turtle]: https://www.w3.org/TR/turtle/
[N3]: https://www.w3.org/TeamSubmission/n3/
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[JSON-LD]: https://www.w3.org/TR/json-ld/
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[RDFa]: https://www.w3.org/TR/rdfa-syntax/
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[RDF-XML]: https://www.w3.org/TR/rdf-syntax-grammar/
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[CSVW]: https://www.w3.org/TR/tabular-data-model/
[HDT]: http://www.rdfhdt.org/
[SPARQL]: https://www.w3.org/TR/sparql11-overview/
[ShEx]: https://shex.io/