Agregátor obsahu

The latest release of JOPA contains several bug fixes and improvements in the Jena driver. The most notable change is the support for reloading file-based storage in OntoDriver. This allows the application to reload data which might have been changed externally.

The reload is supported by the ReloadableDataSource, which can be unwrapped from an EntityManagerFactory. The following example shows this:

final EntityManagerFactory emf = // initialization of the Persistence
// Do some stuff
emf.unwrap(ReloadableDataSource.class).reload();

Note that the reloading happens outside any running transactions.

Agregátor obsahu

A new release of JOPA is out and it contains a long awaited feature - implementation of the Jena OntoDriver. It allows to access Jena-based storage (e.g. TDB) from JOPA, further extending capabilities of JOPA.

An example project using the Jena driver will be published in https://github.com/kbss-cvut/jopa-examples soon.

Agregátor obsahu

This is a maintenance release. It fixes a bug in the clone building process, which caused errors when entities with circular references were encountered.

The next release will introduce a beta version of the Jena OntoDriver, which is currently under development.

Research Topics

  • Ontology-Based Data Integration
    • Unified Foundational Ontology
    • Ontology Engineering 
    • Spatial and Temporal Ontologies
  • Semantic Web
    • Semantic Web Stack RDF(S), OWL (2), SPARQL,
    • Expressive Queries to Semantic Web Ontologies, SPARQL-DL,
    • Annotated Information Search
  • Semantic Information Systems
    • Enterprise Java,
    • OO programming,
    • UML,
    • Web & mobile technologies, 
  • Linked Data & Open Data
    • Data Quality
    • Semantic Data Description

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