Pellet 2.1 Release—Clark & Parsia: Thinking Clearly

We’re happy to announce the release of Pellet 2.1. This release is available for download at the usual location. Since 2.0.2 release, we closed 26 tickets, including numerous enhancements and bug fixes. Some of highlights include the following.

Terp: Syntactic Sugar for SPARQL and OWL

We support a new syntax for SPARQL queries of OWL data, which we call Terp. It’s a mixture of Turtle and Manchester Syntax. For example, two versions of the same query to find all people who work for an organization:


SELECT ?person 
WHERE {?person a [owl:intersectionOf (:Person
         [owl:onProperty :worksFor ;
          owl:someValuesFrom :Organization])]. }

The Terp version is significantly clearer and more concise:


SELECT ?person 
WHERE {?person a (:Person and (:worksFor some :Organization)).}

Terp makes SPARQL queries of OWL easier, more comprehensible, and more concise. Look for a more detailed weblog post about Terp later today.

Disk persistence of classification and realization results

A long-requested feature, we now support persisting reasoning results to disk for use later: available via OWLAPI 3.0 when using Pellet’s incremental classifier (available via command-line in a future release).

New datatype reasoner implementation

More complete, more performant, and more correct compared to earlier versions of Pellet’s datatype reasoner.

Substantially complete OWL2 support

Please report missing OWL2 features as bugs to pellet-users mailing list.

New info subcommand

New command-line subcommand (pellet info) that reports ontology information, statistics, metadata, including OWL2 profile information.

Bug fixes

Many bug fixes as described in the Trac report for this release.

Availability

Pellet 2.1 is available for use in open source projects under the AGPL v.3 license; for commercial usage, alternative license terms are available. Long-term support contracts are available for Pellet.

Please note that the 2.1 release officially deprecates OWLAPI 2.x support, which will be removed entirely in a future release, but not before 2.3. If you have commercial support requirements for OWLAPI 2.x, please contact us.

Pellet 2.1 Release