How could I store multiple ontologies in TDB

Question

I am working on a project which need to save multiple ontologies in one TDB. I tried to do it in my own way, but it didn\'t work. Help me please..If you know how to use TDB , co

Answer 1

These helper functions work for me:

  /**
   * get a model for the given directory
   * 
   * @param directory
   * @return
   */
  public Model getModel(String directory) {
    // Make a TDB-backed dataset
    dataset = TDBFactory.createDataset(directory);

    // open write transaction 
    // see http://jena.apache.org/documentation/tdb/tdb_transactions.html
    dataset.begin(ReadWrite.WRITE);
    Model model = dataset.getDefaultModel();
    return model;
  }

  /**
   * save the given model
   * @param model
   */
  public void saveModel(Model model) {
    if (model != null && dataset != null) {
      model.commit();
      model.close();
      dataset.close();
    }
  }

Answer 2

Which version of Jena?

Try putting the transaction on the dataset.

dataset.begin(ReadWrite.WRITE) ;

see http://jena.apache.org/documentation/tdb/tdb_transactions.html