OpenLink Virtuoso 5.0.9 (Open-Source branch) Post: 302255665

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Special Forums News, Links, Events and Announcements Software Releases - RSS News OpenLink Virtuoso 5.0.9 (Open-Source branch) Post 302255665 by Linux Bot on Thursday 6th of November 2008 10:20:06 PM

11-06-2008

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OpenLink Virtuoso 5.0.9 (Open-Source branch)

OpenLink Virtuoso is a scalable, high-performance SQL-200n compliant object-relational database engine. It provide sophisticated database management for SQL, XML, and RDF. All interaction with Virtuoso occurs via its support of industry standard query languages, protocols, APIs, and data formats such as: ODBC, JDBC, OLE-DB, ADO.NET, XMLA, SQL, SPARQL, XQuery, SOAP, HTTP, WebDAV, SyncML, Atom (Publishing and Syndication), RSS, RDF, and more. License: GNU General Public License (GPL) Changes:
This version brings performance optimizations for the SQL and SPARQL engines and ODBC and JDBC drivers. New features include: an Excel MIME-type output option in the SPARQL endpoint; triple options bif:contains and transitivity; new RDF-generating cartridges with UMBEL lookups for the Sponger; support for very large HTTP client requests; a sparql-auth endpoint with digest authentication; and support for the Ubiquity Firefox plugin. There are also minor bugfixes for memory leaks, SPARQL "select distinct", and various SQL query syntax handling. XHTML validation is done in the ODS application suite.

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librasqal

librasqal(3)						     Library Functions Manual						      librasqal(3)

NAME

       librasqal - Rasqal RDF query library

SYNOPSIS

       #include <rasqal.h>

       rasqal_world*world=rasqal_new_world();
       rasqal_query_results *results;
       raptor_uri *base_uri=raptor_new_uri("http://example.org/foo");
       rasqal_query *rq=rasqal_new_query(world,"rdql",NULL);
       const char *query_string="select * from <http://example.org/data.rdf>";

       rasqal_query_prepare(rq,query_string,base_uri);
       results=rasqal_query_execute(rq);
       while(!rasqal_query_results_finished(results)) {
	for(i=0;i<rasqal_query_results_get_bindings_count(results);i++) {
	 const char *name=rasqal_query_results_get_binding_name(results,i);
	 rasqal_literal *value=rasqal_query_results_get_binding_value(results,i);
	 /* ... */
	}
	rasqal_query_results_next(results);
       }
       rasqal_free_query_results(results);
       rasqal_free_query(rq);
       raptor_free_uri(base_uri);
       rasqal_free_world(world);

       cc prog.c -o prog `pkg-config rasqal --cflags` `pkg-config rasqal --libs`

DESCRIPTION

       The  Rasqal  library  provides a high-level interface to RDF query parsing, query construction, query execution over an RDF graph and query
       results manipulation and formatting.  The library provides APIs to each of the steps in the process and provides support for handling  mul-
       tiple  query  language  syntaxes.  At present Rasqal supports most of the W3C SPARQL 1.0 Query language, some of SPARQL 1.1 draft and fully
       supports RDQL.

       Rasqal uses the libraptor(3) library for providing URI handling, WWW content retrieval and other support functions.

API REFERENCE

       See  the  HTML	API   docs   that   may   be   installed   system   wide   at	/usr/share/gtk-doc/html/rasqal/   or   on   the   web	at
       http://librdf.org/rasqal/docs/api/ <http://librdf.org/rasqal/docs/api/>

API CHANGES

       See the Raptor API docs changes section at http://librdf.org/rasqal/docs/api/rasqal-changes.html <http://librdf.org/rasqal/docs/api/rasqal-
       changes.html>

CONFORMING TO

       SPARQL  Query   Language   for	RDF,   Eric   Prud'hommeaux   and   Andy   Seaborne   (eds),   W3C   Recommendation,   15   January   2008
       http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/ <http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/>

       SPARQL	 Query	 Results   XML	 Format,   Jeen   Broekstra   and   Dave   Beckett   (eds),   W3C   Recommendation,   15   January   2008.
       http://www.w3.org/TR/2008/REC-rdf-sparql-XMLres-20080115/ <http://www.w3.org/TR/2008/REC-rdf-sparql-XMLres-20080115/>

       RDQL - A Query Language for RDF, Andy Seaborne, W3C Member Submission 9 January 2004  http://www.w3.org/Submission/2004/SUBM-RDQL-20040109/
       <http://www.w3.org/Submission/2004/SUBM-RDQL-20040109/>

SEE ALSO

       roqet(1),libraptor(3)

AUTHOR

       Dave Beckett - http://purl.org/net/dajobe/ <http://purl.org/net/dajobe/>

								    2011-01-12							      librasqal(3)