RDFlib

RDFLib is a pure Python package for working with RDF. RDFLib contains most things you need to work with RDF, including:

• parsers and serializers
  • for RDF/XML, N3, NTriples, N-Quads, Turtle, TriX, Trig and JSON-LD & HexTuples
• a Graph interface which can be backed by any one of a number of Store implementations
• many store implementations
  • in-memory, persistent on disk (Berkeley DB) and remote SPARQL endpoints
• a SPARQL 1.1 implementation
  • supporting SPARQL 1.1 Queries and Update statements
• SPARQL function extension mechanisms

Many 3rd party packages support additional stores, parsers etc.

RDFlib Family of packages

The RDFlib community maintains many RDF-related Python code repositories with different purposes. Most of the currently operating packages are shown in Figure 1.

Figure 1: Packages within the RDFlib family.

• Core:
  • rdflib - the rdflib core
• Parsers/Serializers:
  • RDFlib:
    • pymicrodata - This a module to extract RDF from an HTML5 page annotated with microdata
    • pyrdfa3 - RDFa 1.1 distiller/parser library: can extract RDFa 1.1 (and RDFa 1.0, if properly set via a @Version attribute) from (X)HTML, SVG, or XML
  • 3rd party:
    • FunOWL - Functional Syntax
• Stores:
  • RDFlib:
    • rdflib-hdt - A Store back-end for rdflib to allow for reading and querying HDT documents
    • rdflib-zodb - RDFLib Store backed by ZODB3
    • rdflib-kyotocabinet - RDFLib Store backed by Kyoto Cabinet
    • rdflib-leveldb - A LevelDB based Store for rdflib
    • rdflib-sqlalchemy - RDFLib store using SQLAlchemy dbapi as back-end
  • 3rd party:
    • Neo4J - using Neo4J as a back-end. Even support RDF-Star
• SPARQL tools:
  • sparqlwrapper - a simple Python wrapper around a SPARQL service to remotely execute your queries
• OWL Reasoning & Documentation:
  • OWL-RL - A simple implementation of the OWL2 RL Profile on top of RDFLib
  • pyLODE - An OWL ontology documentation tool using Python and templating, based on LODE.
• SHACL validation:
  • pySHACL - A Python validator for SHACL
• Linked Data APIs:
  • pyLDAPI - A very small module to add Linked Data API functionality to a Python Flask installation
• Derived tools:
  • VocPrez - A tool (API and web front-end), based on pyLDAPI, for the read-only delivery system of SKOS vocabularies.

Please see the list of all packages here:

• https://github.com/RDFLib

Documentation

See https://rdflib.readthedocs.io for our documentation built from the code.

Releases

rdflib 6.1.1 is the current release and small releases with small improvements are planned every other month

Release	Date	Note
6.2.0-alpha	Feb 2022 (expected)	Current master branch in GitHub Documentation: readthedocs/latest
6.1.1	12 Dec 2021	Current stable release Release of master as of 12 Dec 2021. Current master Documentation: readthedocs/stable
6.0.2	10 Oct 2021	Minor stable release Release of master as of 10 Oct 2021. Current master
6.0.1	17 Sept 2021	Minor stable release Release of master as of 17 Sept 2021. Current master Documentation: readthedocs/6.0.1
6.0.0	20 July 2021	Major stable release Release of master as of 20 July 2021 Documentation: readthedocs/6.0.0
5.0.0	18 Apr 2020	Previous stable release Release of master contents as of 18 Apr 2020 Last release with Python 2 & 3.4 support Documentation: readthedocs/5.0.0
5.0.0RC1	04 Apr 2020	This was a pre-release of all changes in master as of 04 Apr 2020
4.2.2	30 Jan 2017	Previous stable release Documentation: readthedocs/4.2.2
…	…	…
1.1.1	12 Nov 2002	First release!

Contributing

rdflib survives and grows via user contributions! Please consider lodging Pull Requests here:

• https://github.com/RDFLib/rdflib/pulls

You can also raise issues here:

• https://github.com/RDFLib/rdflib/issues

Support & Contacts

For general “how do I…” queries, please use https://stackoverflow.com and tag your question with rdflib. Existing questions:

• https://stackoverflow.com/questions/tagged/rdflib

If you want to contact the rdflib maintainers, please do so via:

• the rdflib-dev mailing list: https://groups.google.com/group/rdflib-dev
• the chat, which is available at gitter or via matrix #RDFLib_rdflib:gitter.im

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