Upgrading from previous versions
- Added information about upgrading from previous 6.1.x to 6.1.4
- Enabled check for bad index due to XML fragment
- See: README.UPGRADE

Database engine
- Added new implementation of search_excerpt that can handle both ANSI/UTF8 and Wide strings
- Added new setting RdfFreeTextRulesSize
- Added improved support for inference rules based reasoning and materialized Linked Data Views generated from ODBC/JDBC accessible relational databases
- Added option to register post-processing callbacks to SPARQL DESCRIBE
- Added initial support for PHP 5.3 runtime hosting
- Added aggregate DB.DBA.GROUP_DIGEST which makes it possible to return part of large output from DB.DBA.GROUP_CONCAT without running out of row length limits
- Added optimised codegen for built-in aggregate functions
- Added option to enable/disable ?P statistics generation re. SPARQL query patterns
- Added support for HTML5+Microformat, Microformat/JSON and JSON-LD serialization formats re. SPARQL endpoint
- Added support for SPARQL 1.1 IF and COALESCE
- Added support for SPARQL 1.1 SPARQL HTTP Graph Store Protocol covering Graph level CRUD operations
- Added support for SQL QUERY syntax in declaration of Linked Data Views
- Added support for calling XPath/XQuery functions from SPARQL
- Fixed code generation using gawk 4
- Fixed code generation for service invocation for case of IN parameter that is not bound in SINV sub-query is neither external/global nor fixed in parent group pattern
- Fixed col default to be same dtp as col_dtp to prevent default value misuse
- Fixed compiler warnings
- Fixed connection leak in connection pool during long checkpoints
- Fixed crash running FILTER query containing IN clause with only one item in it
- Fixed deadlock on attempt of qr recompile during the run of SPARQL-to_SQL front-end
- Fixed disable dep cols check
- Fixed disabled pg check_map by default to make checkpoint faster
- Fixed handling of GROUP BY and ORDER BY using expressions
- Fixed hang or crash after checkpoint is finished
- Fixed issues with cost based optimizer
- Fixed issue with multiple transitive subqueries in sql optimizer
- Fixed issue with ORDER BY expression optimization
- Fixed JSON output for native parsers
- Fixed key dep cols check for sample
- Fixed lock status report
- Fixed memory leaks
- Fixed possible mutex deadlock
- Fixed problems re-creating quad map
- Fixed rdfview generation
- Fixed recompile all qr's cached on cli connection when dropping a group or creating new graph group
- Fixed set sl owner before cpt_rollback in order to know which thread owns the process, otherwise other threads may wrongly go inside the wait_checkpoint
- Fixed skip rules which perform http redirect when doing a POST
- Fixed space calculation when changed records does not fit in available space on page
- Fixed SPARQL OPTIONAL keyword sometimes causing queries to not return graph matches
- Fixed SQL codegen bug in SPARQL queries of R2RML rewriter
- Fixed when iri exceeds 2KB limit and flag is enabled then shorten the iri, instead of rejecting it
- Rebuilt Jena, Sesame2, and JDBC drivers
- Updated documentation

SPARQL and RDF
- Added new cartridges for Eventbrite, Eventful, Foursquare, Gowalla, Google+, Google Places, Google Product, Google Profile, Gowalla, Guardian, Hyperpublic, Jigsaw, LinkedIn, Plancast, ProgrammableWeb, Seatgeek, Seevl, SimpleGeo, Upcoming, XRD, Zappos, and Zoopla
- Added ontologies for OpenLink CV/Resume, Google+, and many others associated with Sponger Cartridges
- Added new cartridge for Twitter using Twitter 2.0 REST API
- Added enhancements to Facebook Graph API and OpenGraph based cartridges
- Added in-built support for social bookmarking to Facted Browser and Sponger generated Linked Data pages
- Added new HTML base User Interface for default SPARQL endpoint
- Added support for MS-Author-Via: SPARQL, to SPARQL response headers when using SPARQL endpoint
- Added support conditional operators such as: like, =, , > ranges, and IN re., native Faceted Browser pages
- Added improved permalinks functionality Faceted Browser pages
- Added support for javascript-like hrefs in RDFa
- Added w3-1999-xhtml/vocab for RDFa 1.1
- Added HTTP status codes in SPARQL graph store protocol
- Added API for selective sponging via URL enhanced patterns
- Added support for CREATE LITERAL CLASS "format string" ...
- Fixed bad conversion of utf8 in rdf/xml
- Fixed "delayed" filters like ?x p1 ?o1 ; p2 ?o2 . optional { ... } . filter (?o1 = ?o2)
- Fixed map OpenLink Zillow ontology to geo:lat/long
- Fixed map oplog:likes_XXX property to like:likes
- Fixed minor issues
- Fixed SPARUL LOAD INTO command creating duplicate graphs
- Fixed translation from nodeID://xxx to _:xxx
- Fixed url encoding issues in RDF/XML
- Fixed when dropping a graph, also check if there is a quad map for it

ODS Applications
- Added ACL eXecute flag
- Added RDF/XML and TTL representations to Offers
- Added SIOC object services
- Added WebID verification service
- Added annotation rules
- Added app discussion rules
- Added discussion IRIs
- Added header and head links for IRIs
- Added ldap schema support to WebID
- Added mail verification service
- Added support for WebID idp
- Added user's rewrite rules
- Added user/mail availability action
- Updated CKEditor to version 3.6.1
- Fixed ++
- Fixed ACL using patterns
- Fixed API functions
- Fixed call auth check only when needed
- Fixed changing/deleting events does not trigger re-sync with publication
- Fixed Delicious import/publish
- Fixed description presentation
- Fixed Facebook UI
- Fixed IE JS problems
- Fixed import atom sources
- Fixed move/copy API with wrong source/destination
- Fixed navigation and UI
- Fixed Offers, Likes and Dislikes, Topic of Interest
- Fixed search RSS problem
- Fixed SIOC RDF links API functions
- Fixed typo in messages
- Fixed WebDAV selection

March 30, 2011

Announcing Virtuoso Open-Source Edition v6.1.3

New product features as of March 30, 2011, V6.1.3, include:

Core Database Engine

Added configurable normalization of accented characters
Added global X.509 CA repository
Added IMAP, IMAP-SSL and POP3-SSL client support
Added HTTP maintenance functions
Added optimization for case when there is no locality
Added optimization to look at GS index only
Added optimization to boolean expression evaluation
Added read-ahead on extent
Added retry deadlock if HTTP session is not flushed
Added retry on deadlock when sponging on multiple threads
Added support for CORS on http endpoints
Added support for passing NVARCHAR arguments to thread-safe dicts
Added S/MIME encrypt and decrypt functions
Added SSL const decoration in explain
Added new aggregate functions primarily for use with SPARQL-BI
Added transitivity cache
Fixed busy loop when no free remaps
Fixed check for 5xx or 4xx status codes
Fixed check if subselect has a recursive ref
Fixed cost model to count inx cond and scale card at end
Fixed error on INSERT DATA with literals of non-default types
Fixed following checkpoint kill recovery remap extents may have allocated pages with no corresponding logical page because recovery performs unremap. Therefor if em remap page is allocated in em but free in dbs freemap, disregards and reset em allocation, if no logical page. If logical page, concider the dbs freeset in error and mark page as allocated.
Fixed delay increase on sequential deadlock
Fixed index_only on partial can return has data even if main row does not
Fixed infinite loop when dealing with string like abc&def and no token
Fixed issue parsing SPARQL function calls with zero arguments
Fixed issue with aggregates, distinct and ORDER BY
Fixed issue with closing XAConnection and connection pool
Fixed issue with combination of UNION in the argument of IN causing General internal Optimized compiler error
Fixed issue with partial index when no path is followed
Fixed JDBC driver lost prepared data after execution query, so next execute of prepared query throws exception
Fixed memleaks
Fixed moved mutex lock/unlock calls to avoid deadlock
Fixed recovery mode
Fixed send body of 509 bandwidth error
Fixed set HTTP status to 503 when showing maintenance page and added a Retry-After: 1800 (seconds) header as a hint to the remote
Fixed set local timezone
Fixed size of input buffer of an XML parser is now adaptive
Updated documentation

SPARQL and RDF related

Added attribution ontology
Added Evri ontology
Added new Sponger Cartridges for EOL, Evri, Google Books, Groupon, hNews, hRecipe, ProductWiki, RDFa, RDFohloh, and many others
Added checking for RDFa DOCTYPE declaration
Added automatic wdrs:describedby relations for ingested RDF resources
Added expiration header handling re. Sponger cache invalidation scheme enhancements
Added SPARQL-FED for Linked Data virtualization across 3rd party SPARQL endpoints
Added SPARQL, SPARQL-BI, and SPARQL-FED invocation from XSLT
Added index to search over label text
Added initial codegen for ASK subquery
Added lax mode in CSV import
Added MinExpiration param for Sponger
Added more prefixes
Added namespace prefix 'fn' for XPATH 2.0 and XQuery 1.0 Core Functions library
Added new SPARQL-to-SQL codegen for type cast functions

Added new SQL optimization to convert --


sprintf ('format', col0, col1, ..., colN) = exnp

-- into more index friendly --


( col0 = sprintf_inverse ('format', expn, 2)[0] and 
  col1 = sprintf_inverse ('format', expn, 2)[1] and ...  
  colN = sprintf_inverse ('format', expn, 2)[N] )

Added optimization of SPARQL arithmetic and numerical comparisons
Added RDFa W3c validation button
Added RDFS (RDF Schema)
Added refresh=clean mode, to drop cache even if it is in the middle of sponging on another threads
Added scheduler task to keep volume under some limit
Added special immutable setting for inf rules
Added support for CSV as an output format
Added support for DEFINE input:inference in SPARQL DESCRIBE
Added support for DEFINE output:format "NT" for N-Triples
Added support for FILTER EXISTS and FILTER NOT EXISTS
Added support for URL template discovery via http://{virtuoso-instance-cname}/.well-known/host-meta
Added support for INSERT, UPDATE, and DELETE operations against XMLA endpoint
Added support for MINUS
Added support for posh triples
Added support for RDB2RDF
Added support of "rdfs:seeAlso" predicate in case of recursive sponging
Added WebID Protocol-based ACL support across all SSL/TLS endpoints, e.g., WebDAV, SPARQL, Sponger, other Virtuoso deployed Web Services
Fixed datatype for Twitter
Fixed DATETIME format
Fixed do not use triple dicts on long files
Fixed do not check immutable graph when dba is running
Fixed DOI and RDFa handling in Sponger
Fixed enable xlat IRIs
Fixed hReview aggregates handling in Sponger Cartridge
Fixed issue with SPARQL CONSTRUCT/INSERT/DELETE/MODIFY queries
Fixed issue with sponging options and DESCRIBE on /sparql endpoint
Fixed issue with SPARQL FILTER with two OPTIONALs
Fixed issues reported by W3C Validator
Fixed issues with SPARQL-FED, i.e., made it capable of accommodating rudimentary 3rd party SPARQL endpoints
Fixed missing column error in SPARQL-to-SQL preprocessor
Fixed missing namespace in /results
Fixed security issue in SPARQL

Fixed SPARQL parse bug with NOT FROM NAMED queries like --


SELECT DISTINCT ?g ?p NOT FROM NAMED virtrdf: 
   WHERE { GRAPH ?g { ?s ?p ?o }}

Fixed sqltype and display size of DV_IRI_ID column
Fixed use common API to delete target
Fixed use doi proxy if no hslookup plugin
Fixed use DSN from content-location when it exists
Fixed use exclusive locks when doing SPARUL ops
Fixed when selection list contains expressions with constants do not inline OJ
Fixed small bugs

ODS Applications

Added ACL Inheritance
Added ACL semantic ping
Added group sharing
Added IMAP and IMAPS support
Added JSON format for WebFinger
Added language and type options for offers
Added 'Likes', 'Dislikes', 'Owns', 'Knows', and 'Social Network'
Added linkblog pages
Added login with Google account
Added microblog template
Added new index on OL accounts
Added new login and register library
Added profile security for offers, likes, etc.
Added progress bar, ping, and ACL
Added RDF graph property for links
Added RDFa info
Added RSS and Atom imports
Added signed and/or encrypted mails
Added support for LinkedIn
Added Salmon Slap protocol as notification services option
Added support for SWD
Added support for Twitter
Added UI for Login Authentication Keys
Added WebID to 'My Profile'
Fixed ACL handling
Fixed HTTPS handling
Fixed certificates
Fixed hyperlink session expire issue
Fixed OpenID server parameters extraction
Fixed RDF object properties
Fixed Twitter and LinkedIn registration/login
Fixed WebID for Briefcase instances
Fixed X.509 certificates in user pages
Fixed XRDS
Updated to CKeditor version 3.5.2

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2010 News Announcements

July 09, 2010

Announcing Virtuoso Open-Source Edition v6.1.2

New product features as of July 09, 2010, V6.1.2, include:

Database engine
- Added WebID Protocol based authentication for ODBC, JDBC, OLEDB, and ADO.NET client connections
- Added support for following http redirects automatically
- Added extra graph delta-engine functions with regards to diff, iteration over dictionary, and obtaining the biggest possible iri_id on given 32-/64-bit platform
- Added initial support for Python Runtime hosting via bif_python_exec
- Added client- and server-side Semantic Pingback APIs
- Added ODBC setting WideasUTF16 to return UTF-16LE for SQLWCHAR
- Fixed ODBC setting for UTF-8 when DB keeps UTF-8 in VARCHARs
- Fixed ODBC SQLAllocStmt issues exposed when using QtSQL's ODBC layer
- Fixed HTTP, SOAP, XML-RPC when used with proxies and reverse-proxies
- Fixed Conductor UI for handling WebID Protocol WebIDs for ODBC/SQL session logins
- Fixed handling of column default value of 0
- Fixed support for BIGINT in parameter marshalling
- Fixed issue with default maxmempoolsize
- Fixed issue with extent map and free pages map
- Fixed memory leaks
- Fixed issue with freelist chain
- Fixed issue with partitioned TOP ORDER BY
- Updated documentation

SPARQL and RDF
- Added Sponger cartridges for CSV, Etsy.com, FaceBook, OpenGraph, Idiomag, Tumbler, Vimeo, Wine.com, Upstream.tv, and others
- Added more assertions to facets ontology
- Added rdfs:label to default IFP based inference Rule
- Added support for extra encodings
- Added initial support for OData's Atom and JSON feed formats with regards to Linked Data Graph Serialization
- Added support for gz and zip compressed CSV
- Added CSV parser strict mode option
- Added CSV parser lax mode
- Added optimization for large descriptions on about page
- Fixed EAV and SPO labeling modes consistency
- Fixed add escape to CR/LF in JSON format
- Fixed OData, Tesco.com, and HTML5 MicroData cartridges
- Fixed generation of unique graphs lists
- Fixed use label ontology inference rules for automating extraction of geo coordinates
- Fixed SPARQL handling of DISTINCT
- Fixed SPARQL UNION selections
- Fixed SPARQL statement with implicit GROUP BY; do not remove ORDER BY
- Fixed RDFa parsing of @rel and @rev
- Fixed abnormally long RDFa parsing of document with i18n URIs
- Fixed support for subproperties of Inverse Functional Properties (owl:inverseFunctionalProperty)
- Fixed support for loading inference rules from multiple ontology graphs
- Fixed GPF in SPARUL INSERT optimization
- Fixed issue with extra NULLs in HASH JOIN or GROUP BY
- Enhanced iSPARQL using new internal RDF store for speed, browser fixes, and cosmetic changes

Native Providers for Jena, Sesame 2, and Sesame 3
- Added support for creating ruleset
- Added support for inference graph
- Added support for inference and query execution
- Added support for query engine interface, so Jena provider now supports the following query execution modes:
  - parse and execute query via ARQ
  - parse query via ARQ and execute query directly via Virtuoso (new mode)
  - parse and execute query directly via Virtuoso
- Added support for using Virtuosodatasource
- Fixed issue with batch commit
- Fixed Jena's lazy initialization when graph is created
- Fixed handling of quote chars in literals
- Fixed issues with variable binding
- Fixed small bugs

ODS Applications
- Added OpenID 2.0 login and registration
- Added WebID Protocol registration for users pages (JSP, PHP, VSP, etc.)
- Added WebID Protocol based ACLs for shared resources
- Added GoodRelations based Offers as part of Profile Manager
- Added support for associating multiple X.509 certificates with a single WebID
- Added photo and audio upload for JavaScript, VSP, PHP, and JSP pages
- Added Relationship Ontology enhancements to Profile Manager
- Added Client and Server support for PubSubHubbub protocol
- Fixed OpenID + WebID hybrid protocol handling; reverts back to using the same URL for both OpenID- and FOAF-based Profile Page
- Fixed handing of multiple items in Alternate Subject Name slot of X.509 certificate for WebID Protocol
- Fixed GoodsRelations integration with SIOC-based Data Spaces as part of richer Profile Data construction
- Fixed VTIMEZONE component in iCalendar data representation
- Fixed Profile Manager UI associated with GoodRelations Offers
- Fixed Profile Manager UI associated with identification of FavoriteThings

March 31, 2010

Announcing Virtuoso Open-Source Edition v6.1.1

New product features as of March 30, 2010, V6.1.1, include:

Database engine
- Added wizard-based generation of SQL Tables from CSV imports
- Added wizard-based publishing of RDF based Linked Data from CSV files
- Added WebID Protocol login for SQL clients
- Added OPTIONS for HTTP server
- Added support for setMaxRows in JDBC driver
- Added support for JDBC Hibernate
- Added support for unzip_file()
- Added swap guard option
- Fixed deadlock retry
- Fixed memory leaks
- Fixed mtx checks for checkpoint and log write
- Fixed X509ClientVerify flag of 0/1/2/3 to accept self-signed or optional certificates
- Fixed several issues with JDBC XA support
- Fixed use sk_X509_ALGOR_* macros to support OpenSSL 1.0.0
- Fixed wide character when getting procedure columns information.
- Fixed remove id from hash before free structure
- Fixed IN pred as iterator before index path
- Fixed missing initialization in calculation of cost and cardinality
- Fixed SQL codegen for NOT() retval expression
- Updated documentation

SPARQL and RDF
- Added OData cartridge for producing RDF-based Linked Data from OData resource collections
- Added CSV cartridge for producing and deploying RDF-based Linked Data from CSV resource types
- Added uStream cartridge
- Added slidesix cartridge
- Added optimization of sprintf_inverse(const)
- Added improved version of xsl:for-each-row for both SPARQL and SQL
- Added DefaultServiceMap and DefaultServiceStorage
- Added immortal IRI for uname_virtrdf_ns_uri_DefaultServiceStorage
- Added proper ASK support in web service endpoint
- Fixed SPARQL 1.1 compatibility in result set syntax
- Fixed incorrect codegen of formatter in ssg_select_known_graphs_codegen
- Fixed do not encode default graph
- Fixed check if datadump is gz
- Fixed detection of n3 and nt formats
- Fixed regex to remove default ns from XML
- Fixed run microformats independent of RDFa
- Fixed bug with UTF-8 encoded strings in box
- Fixed allow chunked content to be read as strses
- Fixed SERVICE parameter passing for basic Federated SPARQL (SPARQL-FED)
- Fixed (!ask(...)) in filters
- Fixed codegen for FILTER (?local = IRI(?:global)) .
- Fixed codegen in LIMIT ?:global-variable and OFFSET ?:global-variable
- Fixed support for positional and named parameters from exec() or similar in SPARQL, as if they where global variables of other sorts
- Fixed rewriting of group patterns with filters replaced with restrictions on equivs
- Fixed faster loading of inference sets from single and graph groups
- Upgraded native data providers for Jena to version 2.6.2
- Upgraded native data providers for Sesame to version 2.3.1
- Added support for Sesame 2 HTTP repository interface
- Added implemented Sesame's Inference Context interfaces (for backward chained reasoning).

ODS Applications
- Added profile page improvements covering Favorite Things, GoodRelations-based Offerings (via "Seeks" and "Offers" UIs)
- Added alternative registration and profile management pages (VSP, PHP, and Javascript variants) that work REST-fully with ODS engine
- Added X.509 create certificate generation and export to alternative ODS profile management pages (VSP, PHP, and Javascript)
- Added a++ option in user's pages
- Added updates to Certificate Ontology used by WebID Protocol
- Added support for Google map v3
- Added 'Import' to user pages (VSP, PHP, etc.)
- Fixed Profile Management UI quirks
- Fixed SIOC subscriptions
- Fixed object properties in favorites
- Fixed ontology APIs
- Fixed use newer OAT functions
- Fixed invitation problem with multiple users
- Fixed typo in scovo:dimension
- Fixed image preview

Announcing Virtuoso Open-Source Edition v5.0.14

OpenLink Software is pleased to announce a new release of Virtuoso, Open-Source Edition, version 5.0.14.

This version includes:

Database engine
- Added support for CSV import
- Added WebID Protocol login for SQL clients
- Added OPTIONS for http server
- Added support for setMaxRows in JDBC driver
- Added support for JDBC hibernate
- Added support for unzip_file ()
- Added swap guard option
- Fixed deadlock retry
- Fixed memory leaks
- Fixed mtx checks for checkpoint and log write
- Fixed X509ClientVerify flag of 0/1/2/3 to accept self signed or optional certificates
- Fixed several issues with JDBC XA support
- Fixed use sk_X509_ALGOR_* macros to support OpenSSL 1.0.0
- Fixed wide character when getting procedure columns information.
- Fixed remove id from hash before free structure

SPARQL and RDF
- Added support for oData
- Added uStream cartridge
- Added slidesix cartridge
- Added support for Sesame 2 HTTP repository
- Fixed incorrect codegen of formatter in ssg_select_known_graphs_codegen
- Fixed do not encode default graph
- Fixed check if datadump is gz
- Fixed detection of n3 and nt formats
- Fixed regex to remove default ns from XML
- Fixed run microformats independent of rdfa
- Fixed bug with UTF-8 encoded strings in box
- Upgraded to Jena 2.6.2
- Upgraded to Sesame 2.3.1

ODS Applications
- Added user's ontologies in favorites
- Added a++ option in user's pages
- Added support for WebID
- Added support for Google map v3
- Added Register to vsp, php etc users pages
- Added X.509 create certificate to users pages
- Added 'Offers', 'Seeks' etc to user pages
- Added 'Import' to user pages (vsp, php etc)
- Fixed UI profile
- Fixed SIOC subscriptions
- Fixed object properties in favorites
- Fixed ontology APIs
- Fixed use newer OAT functions
- Fixed invitation problem with multiple users
- Fixed typo in scovo:dimension
- Fixed image preview

February 3, 2010

Announcing Virtuoso Open-Source Edition v6.1.0

OpenLink Software is pleased to announce the official release of Virtuoso Open-Source Edition, Version 6.1.0:

***IMPORTANT NOTE*** for upgraders from pre-6.x versions: The database file format has substantially changed between VOS 5.x and VOS 6.x. To upgrade your database, you must dump all data from the VOS 5.x database and re-load it into VOS 6.x. Complete instructions may be found here.

***IMPORTANT NOTE*** for upgraders from earlier 6.x versions: The database file format has not changed, but the introduction of a newer RDF index requires you run a script to upgrade the RDF_QUAD table. Since this can be a lengthy task and take extra disk space (up to twice the space used by the original RDF_QUAD table may be required during conversion) this is not done automatically on startup. Complete instructions may be found here.

New and updated product features include:

Database engine
- Added new 2+3 index scheme for RDF_QUAD table
- Added new inlined string table for RDF_QUAD
- Added optimizations to cost based optimizer
- Added RoundRobin connection support
- Removed deprecated samples/demos
- Fixed align buffer to sizeof pointer to avoid crash on strict checking platforms like sparc
- Fixed text of version mismatch messages
- Fixed issue with XA exception, double rollback, transact timeout
- Merged enhancements and fixes from V5 branch

SPARQL and RDF
- Added support for owl:inverseOf, owl:SymmetricProperty, and owl:TransitiveProperty.
- Added DB.DBA.BEST_LANGMATCH() and bif_langmatches_pct_http()
- Added initial support for SPARQL-FED
- Added initial support for SERVICE { ... };
- Added support for expressions in LIMIT and OFFSET clauses
- Added built-in predicate IsRef()
- Added new error reporting for unsupported syntax
- Added rdf box id only serialization; stays compatible with 5/6
- Added support for SPARQL INSERT DATA / DELETE DATA
- Added SPARQL 1.1 syntax sugar re. HAVING clause for filtering on GROUP BY
- Added special code generator for optimized handling of:
```
SPARQL SELECT DISTINCT ?g WHERE { GRAPH ?g { ?s ?p ?o } }
```
- Added support for HTML+RDFa representation re. output from SPARQL CONSTRUCT and DESCRIBE queries
- Added support for output:maxrows
- Improved SPARQL parsing and SQL codegen for negative numbers
- Improved recovery of lists in DB.DBA.RDF_AUDIT_METADATA()
- Fixed iSPARQL compatibility with 3rd party SPARQL endpoints
- Fixed bad init in trans node if multiple inputs or step output values
- Fixed redundant trailing '>' in results of TTL load when IRIs contain special chars
- Fixed problem with rfc1808_expand_uri not using proper macros and allocate byte extra for strings
- Fixed when different TZ is used, find offset and transform via GMT
- Fixed graph-level security in cluster
- Fixed redundant equalities in case of multiple OPTIONALs with same variable
- Fixed BOOLEAN_OF_OBJ in case of incomplete boxes
- Fixed NTRIPLES serialization of triples
- Merged enhancements and fixes from V5 branch

Sponger Middleware
- Added Extractor Cartridges mapping Zillow, O'Reilly, Amazon, Googlebase, BestBuy, CNET, and Crunchbase content to the GoodRelations Ontology.
- Added Extractor Cartridges for Google Spreadsheet, Google Documents, Microsoft Office Docs (Excel, PowerPoint etc), OpenOffice, CSV, Text files, Disqus, Twitter, and Discogs.

ODS Applications
- Added support for ckeditor
- Added new popup calendar based on OAT
- Added REST and Virtuoso PL based Controllers for user API
- Added new API functions
- Added WebID Protocol groups
- Added feed admin rights
- Added Facebook registration and login
- Removed deprecated rte and kupu editors
- Removed support for IE 5 and 6 compatibility
- Merged enhancements and fixes from V5 branch

Announcing Virtuoso Open-Source Edition v5.0.13

OpenLink Software is pleased to announce a new release of Virtuoso, Open-Source Edition, version 5.0.13.

This version includes:

Database engine
- Added configuration option BuffersAllocation
- Added configuration option AsyncQueueMaxThreads
- Added docbook-xsl-1.75.2
- Added RoundRobin connection support
- Removed deprecated samples/demos
- Fixed copyright and license clarification
- Fixed use MD5 from OpenSSL when possible
- Fixed issue with XA exception, double rollback, transact timeout
- Fixed issue reading last chunk in http session
- Fixed use pipeline client in crawler
- Fixed accept different headers in pipeline request
- Fixed do not post when no post parameters
- Fixed checkpoint messages in log
- Fixed read after allocated memory
- Fixed shortened long URLs in the crawlers view to avoid UI breakage
- Fixed building with external zlib
- Removed support for deprecated JDK 1.0, 1.1 and 1.2
- Rebuilt JDBC drivers

SPARQL and RDF
- Added initial support for SPARQL-FED
- Added initial support for SERVICE { ... };
- Added support for expressions in LIMIT and OFFSET clauses
- Added built-in predicate IsRef()
- Added new error reporting for unsupported syntax
- Added rdf box id only serialization; stays compatible with 5/6
- Added support for SPARQL INSERT DATA / DELETE DATA
- Added support for HAVING in sparql
- Added special optimizations for handling:
```
SPARQL SELECT DISTINCT ?g WHERE { GRAPH ?g { ?s ?p ?o } }
```
- Added support for HTML+RDFa representation re. SPARQL CONSTRUCT and DESCRIBE query results
- Added support for output:maxrows
- Updated ontologies API
- Updated iSPARQL application
- Fixed IRI parts syntax to match SPARQL 1.0 W3C recommendation
- Fixed support for XMLLiteral
- Fixed bad box flags for strings for bnodes and types
- Fixed replace lost filters with equivs that have no spog vars and no "good" subequivs.
- Fixed cnet doublt awol:content
- Fixed Googlebase query results with multiple entries
- Fixed Googlebase location info
- Fixed default sitemap crawling functions/pages
- Fixed use SPARUL LOAD instead of SOFT
- Fixed make sure version is intact as changes to .ttl file must reflect in sparql.sql
- Fixed missing qualification of aggregate
- Fixed compilation of ORDER BY column_idz clause in iterator of fetching Network Resource with loop
- Fixed UNION of SELECTs and for multiple OPTIONALs at one level with "good" and "bad" equalities
- Fixed support for define output:format "JSON"
- Fixed crash of rfc1808_expand_uri on base without schema
- Fixed redundant trailing '>' in results of TTL load when IRIs contain special chars
- Fixed "option (score ...)" in a gp with multiple OPTIONAL {...}
- Fixed when different TZ is used, must find offset and transform via GMT
- Fixed SPARQL parsing and SQL codegen for negative numbers
- Fixed some 'exotic' cases of NT outputs

ODS Applications
- Added support for ckeditor
- Added new popup calendar based on OAT
- Added VSP and REST implementation for user API
- Added new API functions
- Added WebID Protocol groups
- Added feed admin rights
- Added Facebook registration and login
- Removed support for Kupu editor
- Removed support for rte editor
- Removed support for IE 5 and 6 compatibility
- Fixed users paths to physical location
- Fixed problem with activity pages

2009 News Announcements

October 20 2009

Announcing Virtuoso Open-Source Edition v6.0.0

OpenLink Software is pleased to announce the official release of Virtuoso Open-Source Edition, Version 6.0.0:

***IMPORTANT NOTE*** The database format has substantially changed between VOS 5.x and VOS 6.x. To upgrade your database, you must dump all your data from your VOS 5.0 database and re-load it into VOS 6.0.

New product features include:

Faceted Data Exploration Engine & Web Services (REST or SOAP) for high-performance disambiguated entity search & find, across entity type and property dimensions
ANY ORDER Queries
Anytime Queries (basic and complex business intelligence style analytics queries)
Client-level resource accounting
Expressions in "IN" predicate
Inverse Functional Property Value enhanced Identity
Key compression
Transitive subqueries in SQL, SPARQL, and SPASQL (ODBC, JDBC, ADO.NET, OLEDB, XMLA)
Enhanced Sponger Middleware Layer
DBMS hosted Public Key Infrastructure for WebID Protocol based Federated Identity.

October 19 2009

Announcing Virtuoso Open-Source Edition v5.0.12

OpenLink Software is pleased to announce a new release of Virtuoso, Open-Source Edition, version 5.0.12

This version includes:

Database engine
- Added Public Key Infrastructure UI in conductor
- Added failover/roundrobin support for all client layers
- Added support for vectors in IN predicate
- Added various small engine optimizations and enhancements
- Refactored JDBC driver
- Imported PCRE version 7.9 from upstream project
- Fixed XA support
- Fixed performance of sprintf_more when using large buffers
- Fixed memory leaks
- Fixed HTTP various issues with HEAD and POST
- Fixed serialization on HTTP connection cache
- Fixed allow client to run during online backup
- Fixed small bugs and compiler warnings

SPARQL and RDF
- Added SPARQL graph-level security
- Added new RDFa parser
- Added support for Concise Bound Description
- Added optimization for bif:COUNT
- Added optimization for OPTIONAL
- Added support for SCORE_LIMIT in bif:contains
- Added support for text/n3 mime type
- Added support for NVARCHAR, BIGINT in SPARQL and RDFViews
- Added support for exclude-result-prefixes
- Added support to crawl with multiple threads
- Added support for NQUAD, JSON and N-Triples
- Added support for DSA certificates
- Added MS Docs, Open Office, Google app cartridges
- Added CNET, YELP, TESCO, ZILLOW cartridges
- Added GoodRelations, GeoNames, BestBuy cartridges
- Added Alchemy, Yahoo Boss, Picasa, haudio cartridges
- Added cache for common ontologies
- Improved support for rdf:XMLLiteral exp in RDF loaders
- Fixed handling of special characters in IRI
- Fixed RDF view generation
- Fixed and enhanced description.vsp
- Fixed and enhanced iSPARQL
- Fixed charset handling for cartridges

ODS Applications
- Added checks for dynamic local
- Added expiration so sponger can track changes
- Added support for conversations
- Added 'GROUP BY' handling for listed messages
- Added 'Related' section in posts
- Added new API and Ubiquity commands
- Added hCard microformat
- Added Ontology based editing
- Added OpenSearch support
- Added support for Smart Folders
- Fixed OpenID, WebID Protocol
- Fixed wiki attachments "upstreaming"
- Fixed RDF gems
- Fixed UI profile
- Fixed mail filters
- Fixed atom-pub protocol
- Fixed rewrite rules
- Fixed tag URIs
- Fixed small bugs

April 22 2009

Announcing Virtuoso Open-Source Edition v6.0 Technology Preview 1

Currently under very active development, this introduces a new branch for Virtuoso with:

ANY ORDER Queries
Anytime Queries
Client-level resource accounting
Expressions in "IN" predicate
Facet Browsing Engine
Inverse Functional Property Value enhanced Identity
Key compression
Transitive subqueries in both SQL and SPARQL

Announcing Virtuoso Open-Source Edition v5.0.11

This version includes:

Database engine
- Added x.509 Certificate Generation & Management functions
- Improvements to session-handling (strses) to avoid temp-files and improve threading support
- Added initial support for gzipped stream session
- Added support for HTTP, socks4 and socks5 proxying with authentication options
- Added support for URIQA methods in http_client()
- Added support for gunzip in http_client
- Various fixes for FT optimization, fractions in datetime, checkpoint-rollback and the compile/build process.

SPARQL and RDF
- Added compiler extensions for SPARQL graph-level security
- Added initial implementation of RDF graph-level security metadata functions
- Added initial infrastructure for new SPARQL result serialization
- Added support for SSG_VALMODE_SHORT_OR_LONG
- Added support for define sparql-get:proxy for RDF mappers
- Enhanced N3 syntax support
- Added support for XML literals in RDF/XML, SPARQL XML resultset and JSON outputs
- Enhanced speed of TTL output
- Fixed SPARQL/SPARUL security
- VoiD graph generation for describing Quad Store

Sponger Cartridges Related
- Added U.S. Congress Web service
- Added Del.icio.us Tag Lookup Meta Cartridge
- Added GoodRelations and Barters for eCommerce Services
- Added NYT Articles Lookup Meta Cartridge
- Added OpenStreetMap Cartridge
- Added O'Reilly Books Catalog Lookup Meta Cartridge
- Added PowerPoint (PPTX) Cartridge
- Added SCOT based Tag Cloud
- Added Technocrati Lookup Meta Cartridge
- Misc. fixes
- Fixed GPF in rare case when using NOT FROM / NOT FROM NAMED
- Fixed handling of class instance array
- Fixed i18N issues with freetext search in RDF
- Fixed i18N serialization of RDF/XML box
- Fixed incorrect result when Accept is set to "text/rdf-n3"
- Fixed passing retvals of variables from OPTION(), like ?SCORE ?x, from deeply nested subselects

ODS Applications
- Added WebID Protocol and WebID Protocol+OpenID
- Added Bibliographical ontology usage in ODS Graph
- Added Calendar API and upstream commands
- Added "One-Click" X.509 Certificate, Private Key generation plus Browser import, and write to FOAF profile
- Added Messaging Services
- Added Relationships Ontology terms to ODS-AddressBook for qualifying relationships in Social Network
- Added Biographical Ontology terms added to Profile Page UI
- Added Support for MS Live Contacts API
- Additional Ubiquity commands for relationship qualification in Social Network data spaces
- Added Support for Portable contacts API
- Fixed OpenID registration/auth in WebID Protocol+OpenID implementation

February 15 2009

Announcing Virtuoso Open-Source Edition v5.0.10

This version includes:

Database:

Initial support for JDBC 4.x in the JDBC Driver
Self-signed certificates and optional client-verification in HTTPS
HTTP ACLs for rate-limiting
A new `TOP(N, -1)' function for skipping N rows prior to resultset construction
New INI-file options: LiteMode and DisableTcpSocket for thinner embeddable RDF or SQL RDBMS operation; RdfFreeTextRulesSize and IndexTreeMaps for better memory control
Fixes for a deadlock handler bug and various 64-bit issues and compiler warnings
Performance optimizations in the core database engine

RDF Data Management & Data Access:

New Meta Cartridges for UMBEL, Calais, Zemanta, Hoovers and the New York Times
New Sponger cartridges for AB Meta, Last.FM, Twitter, Meetup.com, LibraryThing, SalesForce.com, RadioPop, Rhapsody
Added support for WebID Protocol
New (X)HTML browser page for RDF Linked Data
SPASQL ExtendedString and RdfBox types in .NET
new CURIE-generation functions
Amazon S3 DET and WebDAV mounting
improved Turtle output presentation
Various SPARQL and SPARUL updates and extensions and fixes
Automated generating OWL from DB schema
Fixed memory leaks

OpenLink Data Spaces Application-suite:

New OAuth support
Support for WebID Protocol self-signed certificates written to in FOAF-based member profiles
Support for Amazon S3 folders in ODS-Briefcase
New contact fields in ODS-AddressBook
Ubiquity commands for interacting with all Data Spaces programmatically

2008 News Announcements

November 5 2008

Announcing Virtuoso Open-Source Edition v5.0.9

This version includes significant performance optimizations to the SQL Engine, SPARQL+RDF Engine, ODBC and JDBC drivers.

New features include:

An Excel mime-type output option in the SPARQL endpoint
Enhanced triple options for bif:contains plus new options for transitivity
New RDF-izer Cartridges for the Sponger RDF Middleware Layer
Incorporation of UMBEL lookups and Named Entity Extraction into RDF-izer Cartridges
Support for very large HTTP client requests
A sparql-auth endpoint with digest authentication for using SPARUL via SPARQL Protocol
New commands for the Ubiquity Firefox plugin

There are also minor bug-fixes:

memory leaks
SQL query syntax handling
SPARQL 'SELECT DISTINCT'
XHTML and javascript validation and other UI issues in the ODS application suite

For more details, see the release notes.

August 27, 2008

Announcing Virtuoso Open-Source Edition v5.0.8

This version focuses on performance optimizations and speed enhancements:

SQL compiler is now re-entrant
Self-Join optimizations exposed at JDBC Driver level (as was already the case with ODBC)
SPARQL engine and SPARQL-BI extension optimizations have been merged
TriG serialization format for RDF is now supported alongside RDFa, N3, Turtle, and RDF/XML
Additional Sponger Cartridges for Digg, FriendFeed, and CrunchBase
Improved graph quality and fidelity from existing Cartridges (especially Freebase, eBay, Amazon, Google, Yahoo, and many others)
Improved handling of and bug fixes relating to the `OPTIONAL' SPARQL keyword
Self-Dereferencing fixes (e.g., Sponger was not properly de-referencing its own Proxy URIs)

On the ODS front, the following have been addressed:

More flexible Mapping service model based on new OAT-based Mapping Control (which also includes a "province" locator)
Improved SyncML integration with Briefcase folders
Gem URL fixes for Atom, RSS, and RDF feeds

For more details, see the release notes.

July 17, 2008

Announcing Virtuoso Open-Source Edition v5.0.7

New: fully operational Native Graph Model Storage Providers for the Jena & Sesame Frameworks.

Licensing change: the Jena and Sesame providers have been added to the "Client Protocol Driver exemptions" paragraph in the VOS License.

Improvements:

Better support for alternate RDF indexing schemes
Parallelization of RDF sponger operations across multiple RDF data-sources concurrently
New Sponger Cartridges and enhancements to the existing Cartridge collection
Inference engine optimizations for subclass and subproperty that efficiently handle taxonomies numbering tens of thousands of classes.
owl:equivalentClass and owl:equivalentProperty inference support.
Dynamic handling of host component of IRIs; host component is now flexible enough to painlessly handle multiple homing of domains and host name component changes; no duplicate host name data storage required via [URIQA] section of INI
SPARQL optimizations to improve LIMIT and OFFSET handling
JDBC driver has new connect options, smaller memory footprint and optimized batch support
ODS applications now support SyncML

Documentation Additions:

How to read query plans and how to use the key performance meters
How to diagnose SPARQL queries and how to decide what indexing scheme is right for each RDF use case
How to debug RDF views
Better Documentation on SPARQL extensions and options
An updated RDF View example based on the Northwind demonstration database that reflects underlying enhancements

Bug Fixes:

Generally improved safety of built-in functions, better argument checking.
Verified UTF8 international character support in all RDF use cases, SQL client/SPARQL protocol/all data formats.

For more details, see the release notes.

March 28, 2008

Announcing Virtuoso Open-Source Edition v5.0.6

On the RDF side, the bitmap intersection join has been optimized so that it is now typically twice as efficient as an equivalent nested loop join.

In some cases XML trees in the object position in RDF quads were incorrectly indexed, leading to failure to retrieve quads. This is fixed and should problems occur in existing databases, they can be corrected by simply dropping and re-creating an index.

The cost model has been further tuned. We have run the TPC-H queries with larger databases and have profiled it extensively. There are improvements to locking, especially for concurrency of transactions with large shared lock sets, as is the case in the TPC-H queries. The rules stipulate that these have to be run with repeatable read. There are also optimizations for decimal floating point.

As part of the completion of our Business Intelligence extensions to SPARQL (SPARQL-BI), we released a sampling of TPC-H queries translated into SPARQL, and integrated this into the standard demonstration database. The new demo database provides a live sample of the TPC-H schema and instance data in linked-data form, complete with SPARQL-BI variants of the standard TPC-H queries. Relational-to-RDF model-mapping is now demonstrably mature and robust enough for enterprise-grade business-intelligence applications.

For more details, see the release notes.

Feb 12, 2008

Announcing Virtuoso Open-Source Edition v5.0.5

The previous release, 5.0.4, was short-lived due to a problem in SPARQL-to-SQL code-generation, so this announcement addresses the new features introduced over and above version 5.0.3:

In the core Database Engine: Added the LUBM benchmark for RDF data managers to testsuite; a check for backup/restore status; optimizations and an inxop option for bitmap indexes.

In the areas of RDF and SPARQL: Support for xsl:float; Sponger cartridges for SVG, XBRL and HR-XML documents; URL-rewrite rules for XBRL; additional SPARQL engine optimizations.

In the ODS Applications Suite: New support for Meaning of a Tag (MOAT); Support for Identity and authentications standards such as OpenID 2.0 and OAuth; additional ODS generated dereferenceable URIs; enhanced Wiki search; improvements to Calendar.

Additionally, there are the following bug-fixes: In the core database: Problems with FTP server and HTTP headers; saved unnecessary seeks in bitmap checks; fixed the 64-bit range of IRI and row IDs; various minor bug-fixes and compiler-warnings.

In the ODS Applications Suite: Fixed ATOM protocol upstreaming, Creole markup, docbook and invalid HTML generation in ODS-Wiki; improvements to SIOC based RDF instance data in relation to ODS-Calendar todo-lists; a new UI for system navigation.

2007 News Announcements

December 12, 2007

Announcing Virtuoso Open-Source Edition v5.0.3

Features and enhancements associated with this release include:

In the Database Engine:

Added transparent HTTP Content Negotiation
Added improvements for deadlock handling
Added new PHP hosting module to replace old virtuoso-php-t server
Added stored procedure hook DB.DBA.BACKUP_COMPLETED
various bugfixes

SPARQL and RDF:

Added support for SPARQL update via HTTP GET/PUT in WebDAV
Added Jena, Sesame and Redland interfaces
Added Bibliontology for Amazon cartridge
Added OAI, XBRL and Yahoo Finance cartridges
Added support for option (SOFT EXCLUSIVE)
Added support for PROVEN_MATCH
Added adaptive dictionary of objects for graph keywords
Added functions for running stats on rdf loading
Improved speed of RDF loading
Improved support for aggregate expressions
Use UTF-8 for RDF serialization
Various speedups for SPARQL

ODS Application Suite:

Added a++ links
Added feature to reorder tabs on the main navigation bar
Added HTTPS support to ODS
Added LDAP to FOAF support
Added news feed block
Added SCOT tags
Added support for ods activity type to opensocial
Added table for ods messaging
Added trigger for "application added" activity
Replaced URLs with SIOC Data Space URIs
Various bugfixes and enhancements

September 27, 2007

Announcing Virtuoso Open-Source Edition v5.0.2

Features and enhancements associated with this release include:

64-bit Integer Support
RDF Sink Folders for WebDAV - enabling RDF Quad Store population by simply dropping RDF files into WebDAV
SPARUL implementation optimizations
Enhanced typed literal support in SPARQL, e.g., xsd:string() and xsd:boolean()
Additional automatic metadata extraction from Audio binary files
Support for PHP 5.2 runtime hosting
Enhanced UI for RDF Linked Data deployment via URL-rewrite rules
New Sponger Cartridges for Facebook, Freebase, Wikipedia, GRDDL, RDFa, eRDF, and more
Demonstration Database includes RDF Views & SQL Table samples for the THALIA data integration benchmark and testsuite
Tutorial Application includes Linked Data style RDF Views for the Northwind SQL DBMS schema (which is the same as the standard Virtuoso demo database schema)
A new Amazon EC2 Image variation of Virtuoso with a fully configured instance comprising the Virtuoso core, OpenLink Data Spaces application suite and the OpenLink Ajax Toolkit.

May 31, 2007

Announcing Virtuoso Open-Source Edition v5.0.1

This version includes:

An enhanced cost-based optimizer
- Use of fixed rather than dynamically generated statistics, enhancing the Inference Engine
- Added larger sample in query cost model sampling
Enhanced SPARQL support:
- Added wide row BREAKUP function to Virtuoso SQL enabling further optimization of RDF Views of SQL data
- Added support for LIMIT and OFFSET clauses to CONSTRUCT and DESCRIBE
- Significant performance optimizations
- Added QUAD MAP <...> { ... }group pattern which adds granularity to "Triple Provenance" management
Documentation updates
Significant update of all ODS applications
- Added compliance with the latest SIOC vocabulary
- Added Calendar Data Space for managing events and exposing data as RDF
- Added OpenID login and registration
- Added new SIOC spec subclasses which exploit Virtuoso's RDF-inference engine
- Added AddressBook Data Space for managing Social Networks via SIOC
- Other bug fixes

April 4, 2007

Release v5.0.0

This version includes a major rewrite of the database engine, giving drastic speed improvements on both single- and multiple-CPU architectures, both to the SQL engine and RDF Views (SQL-RDF mapping). RDF support now includes middleware (called the Sponger) for transforming existing microformat, Web services, and XHTML data into RDF triples "on the fly". This release has full text indexing of literal objects in triple patterns, basic inferencing (subclass and subproperty support), SPARQL update language support and aggregate functions, and improved support for the XML Schema Type System (bif:xcontains).

2006 News Announcements

December 6, 2006

Announcing Virtuoso Open-Source Edition v4.5.7

This version includes the following enhancements:

RDF storage now uses bitmap indexing by default;
RDF Views functionality for exposing SQL Data on the fly as RDF Instance Data for SPARQL Query Access is now stable;
Declarative N3/Turtle-based syntax for declaring RDF VIEWs of SQL Data is now stable;
SPARQL extensions for automatic crawling of related resources now implemented;
Miscellaneous SMP-related engine improvements.

The new RDF functionality will be documented by new articles to come on the Virtuoso Open-Source wiki.

There are also bug fixes in the following areas:

RDF parsing
Building without SSL support
Finding certificates when implementing HTTPS websites
Byte-order conversion issues when copying database between platforms
Minor build issues

October 27, 2006

Announcing Virtuoso Open-Source Edition v4.5.6

This version includes the following enhancements to the core Universal Server Engine:

New declarative RDF Views language for generating "Virtual RDF Graphs" from SQL data, by mapping SQL to RDF in real time. This means that any relational data stored in Virtuoso or any other relational database can be converted seamlessly to RDF and queried with SPARQL without making an RDF copy of the data itself
Enhanced RDF Triple Store
Support for the RDF NET Protocol for reading and writing to Triple Store
Support for the Semantic Bank Protocol for reading and writing to Triple Store (Virtuoso is now a bona-fide PiggyBank backend)
SPARQL Processor performance-enhancements
New AJAX-based Interactive SPARQL Query GUI
Bitmap index support - This is a generic SQL and engine enhancement that delivers dramatic space savings and increased performance specially in RDF triple storage and many business intelligence workloads.
Documentation updates covering: RDF APIs, the ATOM and GData protocols
Runtime hosting for PHP5 in addition to PHP4
Online Documentation and Tutorials now mapped to SIOC ontology thereby presenting documentation as an RDF data-set accessible to SPARQL Queries
Engine enhancements including automatic background compaction for up to 30% less space usage for typical relational or RDF databases, better SMP behavior with shorter critical sections, fixes in transaction logic and more

The release also includes the following enhancements to the OpenLink Data Spaces (ODS) application suite:

Built-in support for the Semantically Interlinked Online Communities (SIOC) Ontology
Built-in support for the FOAF (Friend Of A Friend) Ontology
Built-in support for the AtomOWL Ontology
Built-in support for the SKOS (Simple Knowledge Organization System) Ontology
New SPARQL usage examples demonstrating SIOC, FOAF, SKOS and AtomOWL based on their use across each ODS application realm
GeoURL support in the ODS-Weblog application
Support for OpenID for browser-based authentication (client- and server-side)
Support for Yadis authentication discovery protocol (client- and server-side)
Significantly improved UI

8 Aug 2006:

Announcing OpenLink Data Space Update 2

This update of the ODS application-suite adds pervasive support of the SIOC ontology. All relevant pages have a link to a dynamically generated SIOC file that contains the most-recent updates of the application as RDF. Also, all ODS application data is now queriable via SPARQL. See VOSODSSparqlSamples for a set of sample queries.

Announcing Virtuoso Open Source Edition 4.5.4

The Virtuoso triple-store now implements the Semantic Bank protocol and is compatible with the Piggybank browser plugin. See using Piggybank with Virtuoso for details.

This release of Virtuoso adds a new dynamic SQL costs and statistics_model with special support for SPARQL. See our white paper for this and other enhancements. We also add a parallel TTL loader which can use multiple CPU's and overlap IO with loading. See the ttlp_mt function in the documentation.

To upgrade a previous installation of Virtuoso Open Source Edition and OpenLink Data Spaces, see Upgrading Instructions.

8 June 2006:

Announcing OpenLink Data Spaces (ODS)

ODS is a suite of Virtuoso applications for creating and maintaining modern web-presence. It includes Social Networking, Weblog Platform, File Sharing, Wiki Platform, RSS 2.0, Atom 1.0, and RSS 1.1 Content-Aggregation Platform and more.

ODS has been developed to provide and a coherent nexus for Web-2.0 and the Semantic Web (also known as Data Web). All ODS application Data Spaces can be queried via Google's GData protocol. All Data Space front-end pages offer RSS 2.0, ATOM 1.0, and RSS 1.1 (RSS-RDF) content-syndication feeds, FOAF (for individual Data Space insights covering data and social networks), vCard, XBEL and other standard data-interchange formats where applicable.

ODS also offers browsing of application data via WebDAV, making your data-universe visible as a filesystem in the form of a URI-addressable and mountable tree (viewable via WebDAV-aware clients). A later release will add SPARQL access to application data.

Announcing Virtuoso Open Source Edition 4.5.3

This update of Virtuoso adds support for the OpenLink Data Spaces, now bundled into the source tree.

Metadata of resources stored in Virtuoso's WebDAV repository is now queriable with SPARQL. There are updates to tutorials and demos plus bug-fixes.

27 April 2006:

Virtuoso Open-Source Edition 4.5.2 is now available. The new release adds Windows support with both a binary distribution and Visual Studio project files, better SPARQL support and documentation, bug fixes and more.

25 April 2006:

Virtuoso Scalability: analysis of OLTP performance factors on different hardware.

17 April 2006:

New Article: see how to use Virtuoso's XML and text capabilities for smart search and filtering.

11 April 2006:

Initial release of Virtuoso Open-Source Edition (version 4.5.1): Press Release

Feeds

Recent Pages

Virtuoso Open Source Edition News

2011 News Announcements

November 1, 2011

Announcing Virtuoso Open-Source Edition v6.1.4

March 30, 2011

Announcing Virtuoso Open-Source Edition v6.1.3

Core Database Engine

SPARQL and RDF related

ODS Applications

Download

2010 News Announcements

July 09, 2010

Announcing Virtuoso Open-Source Edition v6.1.2

March 31, 2010

Announcing Virtuoso Open-Source Edition v6.1.1

Announcing Virtuoso Open-Source Edition v5.0.14

February 3, 2010

Announcing Virtuoso Open-Source Edition v6.1.0

Announcing Virtuoso Open-Source Edition v5.0.13

2009 News Announcements

October 20 2009

Announcing Virtuoso Open-Source Edition v6.0.0

October 19 2009

Announcing Virtuoso Open-Source Edition v5.0.12

April 22 2009

Announcing Virtuoso Open-Source Edition v6.0 Technology Preview 1

Announcing Virtuoso Open-Source Edition v5.0.11

February 15 2009

Announcing Virtuoso Open-Source Edition v5.0.10

2008 News Announcements

November 5 2008

Announcing Virtuoso Open-Source Edition v5.0.9

August 27, 2008

Announcing Virtuoso Open-Source Edition v5.0.8

July 17, 2008

Announcing Virtuoso Open-Source Edition v5.0.7

March 28, 2008

Announcing Virtuoso Open-Source Edition v5.0.6

Feb 12, 2008

Announcing Virtuoso Open-Source Edition v5.0.5

2007 News Announcements

December 12, 2007

Announcing Virtuoso Open-Source Edition v5.0.3

September 27, 2007

Announcing Virtuoso Open-Source Edition v5.0.2

May 31, 2007

Announcing Virtuoso Open-Source Edition v5.0.1

April 4, 2007

Release v5.0.0

2006 News Announcements

December 6, 2006

Announcing Virtuoso Open-Source Edition v4.5.7

October 27, 2006

Announcing Virtuoso Open-Source Edition v4.5.6

8 Aug 2006:

Announcing OpenLink Data Space Update 2

Announcing Virtuoso Open Source Edition 4.5.4

8 June 2006:

Announcing OpenLink Data Spaces (ODS)

Announcing Virtuoso Open Source Edition 4.5.3

27 April 2006:

25 April 2006:

17 April 2006:

11 April 2006: