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ANNOUNCEMENT: Rasqal RDF Query Library 0.9.29

From: Dave Beckett <dave@dajobe.org>
Date: Sun, 13 May 2012 20:54:02 -0700
Message-ID: <4FB081DA.5030606@dajobe.org>
To: 'Semantic Web' <semantic-web@w3.org>
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		   Rasqal RDF Query Library 0.9.29
		      http://librdf.org/rasqal/

Rasqal is a free software / Open Source C library that handles Resource
Description Framework (RDF) query language syntaxes, query construction
and execution of queries returning results as bindings, boolean, RDF
graphs/triples or syntaxes. The supported query languages are:
  SPARQL 1.0[3], RDQL (will be removed in 0.9.30),
  SPARQL Query 1.1[4], SPARQL Update 1.1[5] (no executing) and
  Experimental SPARQL extensions (LAQRS).
Rasqal can write binding query results in the following formats:
  SPARQL XML, SPARQL JSON, CSV, TSV, HTML, ASCII tables, RDF/XML and
  Turtle / N3
and read them in:
  SPARQL XML, RDF/XML and Turtle / N3.

Rasqal was designed to work closely with the Redland librdf[1] RDF
library and the Raptor[2] RDF Syntax Library but is entirely separate
from both.

This is a beta quality library - the code is mature, the API is
mostly stable but changing slowly.  Rasqal supports all of SPARQL 1.0
query and most of SPARQL 1.1 query.  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 2011-11-17 are:
 * Supports all of SPARQL 1.0 by passing 100% of the approved tests
 * Added support for XSD date
 * Made XSD dateTime and XSD date equality and comparison work
 * Make limit and offset check work properly in a subquery
 * Correctly handle errors during aggregation expressions evaluation
 * Fix blank node generation when made in a CONSTRUCT to match SPARQL
 * Added SPARQL 1.1 draft UUID() and STRUUID() support
 * Requires Raptor 2.0.7+
 * RDQL support will be removed in the next release (0.9.30)
 * Made other fixes and improvements including fixing reported issues:
   0000493, 0000494 and 0000504

For full details see the Rasqal 0.9.29 release notes at
  http://librdf.org/rasqal/RELEASE.html#rel0_9_29

  rasqal-0.9.29.tar.gz
  MD5    49e4b75a0c67465edf55dd20606715fa
  SHA256 8b218dc51b77b99f33103a9251218a4439748f73ee30fa8ee549ab6d150e7c53

The Rasqal API reference manual section on API changes at
http://librdf.org/rasqal/docs/api/raptor-changes.html provides
detailed function, enum, macro and type changes.

Rasqal 0.9.29 requires Raptor 2.0.7[2] or newer to provide RDF
syntax, web, XML and URI support.  Optional requirements are a POSIX
regular expression library such as PCRE or one built into the C
library to handle regex matching / replacing; a multi-precision
decimal library such as GNU MP or MPFR for handling XSD decimals;
a UUID library for generating unique IDs.

Binary deb packages for Debian unstable will be made available
later via the standard Debian archive.

The http://librdf.org/ site lets you browse and check out the latest
version of the sources in GIT 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 librdf RDF API library
http://librdf.org/

[2] Raptor RDF Syntax Library
http://librdf.org/raptor/

[3] SPARQL Query W3C Recommendation 2008-01-15
http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/

[3] SPARQL 1.1 Query W3C Working Draft of 2012-01-05
http://www.w3.org/TR/2012/WD-sparql11-query-20120105/

[4] SPARQL 1.1 Update W3C Working Draft of 2012-01-05
http://www.w3.org/TR/2012/WD-sparql11-update-20120105/
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Received on Monday, 14 May 2012 03:54:28 UTC

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