OpenLink Virtuoso Universal Server 4.5.7 review

OpenLink Virtuoso is a Virtual Database product that provides transparent real-time access to disparate data sources (ODBC, JDBC, XML

License: GPL (GNU General Public License) File size: 0K Developer: Ted Thibodeau Jr

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OpenLink Virtuoso is a Virtual Database product that provides transparent real-time access to disparate data sources (ODBC, JDBC, XML, and Web Services), and transparent integration of disparate application logic (e.g. Mono ECMA-CLI and J2EE integration). OpenLink Virtuoso Universal Server's broad protocol support enables it to offer Web, File, and SQL database server functionality alongside native XML storage, and Web services platform functionality as part of a cohesive single server solution.

Virtuoso is at the core a high performance object-relational SQL database. As a database, it provides transactions, a smart SQL compiler, powerful stored procedure language with optional Java and .Net server side hosting, hot backup, SQL 99 and more. It has all major data access interfaces, as in ODBC, JDBC, ADO .Net and OLE/DB.

Virtuoso has a built-in web server which can serve dynamic web pages written in Virtuoso's web page language as well as PHP, ASP .net and others. This same web server provides SOAP and REST access to Virtuoso stored procedures, supporting a broad set of WS protocols such as WS-Security, WS-Reliable Messaging and others. A BPEL4WS run time is also available as part of Virtuoso's SOA suite.

Virtuoso has a built-in WebDAV? repository. This can host static and dynamic web content and optionally provides versioning. The WebDAV? repository is tested to interoperate with WebDAV? clients built into Windows XP, Mac OSX and others and makes Virtuoso a convenient and secure place for keeping one's files on the net. Further, Virtuoso provides automatic metadata extraction and full text searching for supported content types.

Open Virtuoso supports SPARQL embedded into SQL for querying RDF data stored in Virtuoso's database. SPARQL benefits from low-level support in the engine itself, such as SPARQL aware type casting rules and a dedicated IRI data type. This is the newest and fastest developing area in Virtuoso.

What's New in This Release:
RDF storage now uses bitmap indexing by default.
RDF Views functionality for exposing SQL Data as RDF dynamically for SPARQL Query Access using a declarative N3/Turtle-based syntax is now stable.
SPARQL extensions for automatic crawling of related resources have been implemented.
There ar emiscellaneous SMP-related engine improvements.
There fixes for RDF parsing, building without SSL support, finding certificates when implementing HTTPS Web sites, byte-order conversion issues when copying database between platforms, and minor build issues.