[redland-announce] ANNOUNCEMENT: Rasqal RDF Query Library 0.9.31

[Dave Beckett]

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		   Rasqal RDF Query Library 0.9.31
		      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]
  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, SPARQL CSV, TSV, 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 2012-01-22 are:
 * roqet(1) with new -t mode can now read query results formats and act
   as a results format converter
 * Added read support for SPARQL 1.1 Query Results CSV and TSV Formats
 * Query engine can execute VALUES
 * Multiple configuration and build improvements
 * Several query engine bug fixes
 * Made other fixes and improvements including fixing reported issues:
   0000527, 0000536, 0000537, 0000538 and 0000539

For full details see the Rasqal 0.9.31 release notes at
  http://librdf.org/rasqal/RELEASE.html#rel0_9_30

  rasqal-0.9.31.tar.gz
  SHA256 28d743c9f1b0e5b0486ae4a945fa1e021c8495707e7adbfa0e232244b28b7fee
  MD5    11c024550848ac2475d70388cc214eae

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 0.9.31 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 Recommendation of 2013-03-21
http://www.w3.org/TR/2013/REC-sparql11-query-20130321/

[4] SPARQL 1.1 Update W3C Recommendation of 2012-03-21
http://www.w3.org/TR/2013/REC-sparql11-update-20130321/
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