Redland librdf RDF API and triple stores http://librdf.org/

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README.html










Redland librdf RDF API Library


Dave Beckett




Overview



Redland librdf is a
library that provides a high-level interface for
the Resource Description Framework (RDF) allowing the RDF
graph to be parsed from XML, stored, queried and manipulated.
Redland librdf implements each of the RDF concepts in its own class via an
object based API, reflected into the language APIs, currently C#, Java,
Perl, PHP, Python, Ruby and Tcl. Several classes providing functionality
such as for parsers, storage are built as modules that can be loaded
at compile or run-time as required.



This is a mature and stable RDF library developed since 2000
used in multiple projects. See the
FAQS for general information
and the Redland issue tracker
for known bugs and issues. A summary
of the changes can be found in the NEWS file,
detailed API changes in the release notes
and file-by-file changes in the Subversion ChangeLog.



Redland librdf provides:



  • A modular, object based library written in C

  • APIs for manipulating the RDF graph and parts - Statements, Resources and Literals

  • Language Bindings in Perl, PHP, Python and Ruby via the Redland Bindings package.

  • Reading and writing multiple RDF syntaxes with Parsers and Serializers via the Raptor RDF Parser Toolkit.

  • Storage for graphs in memory and persistently with Sleepycat/Berkeley DB, MySQL 3-5, PostgreSQL, SQLite, Openlink Virtuoso, in-memory Trees, files or URIs.

  • Query language support for SPARQL 1.0 (some 1.1) and RDQL using Rasqal.

  • APIs for accessing the graph by Statement (triples) or by Nodes and Arcs

  • Contexts for managing aggregating named graphs and recording provenance.

  • Statement Streams for efficient construction, parsing and serialisation of graphs

  • rdfproc RDF processor utility program

  • No memory leaks.




Sources



The packaged sources are available from
http://download.librdf.org/source/.
The development GIT sources can also be
browsed on GitHub
or checked out at git://github.com/dajobe/librdf.git



librdf requires
Raptor 2.0.7 or newer
and
Rasqal 0.9.26 or newer
to build and run, which can be downloaded from the same area
as the librdf source and binaries.




License



This library is free software / open source software released
under the LGPL 2.1 (GPL) or Apache 2.0 licenses. See
LICENSE.html for full details.




Installation and Documentation



See INSTALL.html for general
installation and configuration information.



Further documentation is available in the
documents area including the
API reference document and
detailed storage modules information.




Mailing Lists



The
Redland mailing lists
discuss the development and use of the Redland libraries as well as
future plans and announcement of releases.







Copyright (C) 2000-2013 Dave Beckett
Copyright (C) 2000-2005 University of Bristol