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ANNOUNCEMENT: Rasqal RDF Query Library 0.9.17

From: Dave Beckett <dave@dajobe.org>
Date: Wed, 16 Dec 2009 19:32:05 -0800
Message-ID: <4B29A635.8060607@dajobe.org>
To: 'Semantic Web' <semantic-web@w3.org>
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		   Rasqal RDF Query Library 0.9.17
		      http://librdf.org/rasqal/

Rasqal is a free software / Open Source C library that provides
querying of Resource Description Framework (RDF) with multiple query
languages syntaxes, query construction by API and execution of
queries returning results as bindings, boolean, RDF graphs/triples
or syntaxes.  It supports the following query languages:
  SPARQL 1.0, RDQL,  Experimental SPARQL extensions (LAQRS)
and can write binding query results in the following formats:
  SPARQL XML, SPARQL JSON, CSV, TSV and ASCII tables.

Rasqal is designed to work closely with the Redland[1] RDF library
and the Raptor[2] RDF parsing and serializing library but is entirely
separate from both.

Rasqal is beta quality; the API is still changing.  It is a portable
library and has been tested on multiple POSIX systems and
architectures.  Rasqal has no known memory leaks.

The main changes in this version since the last release 2008-07-05 are:
 * ABI AND API CHANGED in this release
   *** Rasqal 0.9.17 is incompatible with 0.9.16 or earlier ***
   *** shared library soname .so.X has changed ***
 * Added a new query engine that implements the SPARQL algebra better
 * All constructors now take a rasqal_world argument
 * Added LAQRS syntax support for SUM, AVG, MIN, MAX, COALESCE()
   experimental syntax
 * Added query result formatters for CSV, TSV and ASCII tables
 * Prefer pkg-config for configuring
 * Many resilience and resource failure fixes by Lauri Aalto
 * Many other bug fixes and improvements were made
 * Fixed Issues: Issue#0000077, Issue#0000128, Issue#0000168,
   Issue#0000258, Issue#0000261, Issue#0000271, Issue#0000279 and
   Issue#0000305

For full details see the Rasqal 0.9.17 release notes at
  http://librdf.org/rasqal/RELEASE.html#rel0_9_17

Rasqal 0.9.17 requires Raptor 1.4.18[2] or newer to provide RDF, web,
XML and URI support. Optional requirements include a POSIX regular
expression library such as PCRE or one built into the C library to
handle regex matching and a multi-precision decimal library such
as GNU MP or MPFR.

Binary deb packages for Debian unstable will be made available
shortly via the standard debian archive and download.librdf.org.

Sources are also available from the Redland SourceForge mirror site
at http://sourceforge.net/projects/librdf/ although the site is such
a usability disaster that I'm not likely to use it anymore.

The http://librdf.org/ site lets you browse and check out the latest
version of the sources in Subversion and try out Rasqal (as part of
Redland) in a web demonstration at http://librdf.org/query
and as part of Triplr http://triplr.org/

For more information on Redland, Raptor or Rasqal please join
the redland-dev list by visiting http://librdf.org/lists/
or visit IRC channel #redland on irc.freenode.net

Issues should be reported to http://bugs.librdf.org/

Dave

[1] Redland RDF library,
http://librdf.org/

[2] Raptor RDF parser and serializer library,
http://librdf.org/raptor/
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Received on Thursday, 17 December 2009 03:33:21 GMT

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