Redland RDF Libraries

Redland is a set of free software C libraries that provide support for the Resource Description Framework (RDF).

• Modular, object based libraries and APIs for manipulating the RDF graph, triples, URIs and Literals.
• Storage for graphs in memory and persistently with Oracle Berkeley DB, MySQL 3-5, PostgreSQL, OpenLink Virtoso, SQLite, files or URIs.
• Support for multiple syntaxes for reading and writing RDF as RDF/XML, N-Triples and Turtle, RSS and Atom syntaxes via the Raptor RDF Syntax Library.
• Querying with SPARQL and RDQL using the Rasqal RDF Query Library.
• Data aggregation and recording provenance support with Redland contexts.
• Language Bindings in Perl, PHP, Python and Ruby via the Redland Bindings package.
• Command line utility programs rdfproc (RDF), rapper (parsing) and roqet (query).
• Portable, fast and with no known memory leaks.

The Redland library packages are:

• Raptor RDF Syntax Library - libraptor2 for parsing and serializing RDF syntaxes
  2.0.16 release raptor2-2.0.16.tar.gz (2023-03-01)
• Rasqal RDF Query Library - librasqal for executing RDF queries
  0.9.33 release rasqal-0.9.33.tar.gz (2014-12-15)
• Redland RDF Library - librdf providing the RDF API and triple stores. Requires: Raptor and Rasqal
  1.0.17 release redland-1.0.17.tar.gz (2013-12-28)
• Redland Language Bindings for language APIs to Redland in Perl, PHP, Python and Ruby. Requires: Redland.
  1.0.17.1 release redland-bindings-1.0.17.1.tar.gz (2014-05-10)

These are mature RDF packages developed since 2000 used in several projects. Each library has its own news, detailed release notes, and reference documentation with examples.

License

All Redland packages are free software / open source software and released under the LGPL 2.1, GPL 2 or Apache 2 licenses as alternatives. See the individual package license files for full details and any exceptions.

Help and Support

The Redland mailing lists can be used to discuss the development and use of Redland, Raptor and Rasqal as well as hear about future plans and get the first release announcements. There is also an #redland IRC channel on the freenode IRC network irc.freenode.net. For other license and support options, contact Dave.