KDE 4.2 PyKDE API Reference
soprano Module
*
Soprano (aka QRDF) - A modular RDF storage framework
* * %Soprano is a QT-based pluggable framework for RDF storage and parsing. It tries to provide a highly usable * interface to several RDF storage solutions. * * Overview * * %Soprano centers around the Soprano.Model class which represents one storage set. A Soprano.Model is basically a set of * RDF quadruples, i.e. Soprano.Statement. The actual storage is done via Soprano.Backend plugins. All * query operations return Soprano.Iterator instances. Iterator is a explicitely shared class which is very * easy to understand and use. * * %Soprano makes the distinction between two types of Models: Soprano.StorageModel and Soprano.FilterModel. * The former one is intended to be the basic Model which actually stores the data while the latter ones can be * stacked on top of a Soprano.StorageModel to perform certain filter operations. Thes filter operations can range * from very basic things such as disallowing any write operation (Soprano.Util.ReadOnlyModel) to more complex * things such as full text indexing of all literal statements (Soprano.Index.IndexFilterModel) or exporting * the Model via D-Bus (Soprano.Server.DBusExportModel). * * Apart from storage %Soprano provides a system for RDF parser and serializer plugins. For more details on parsing * or serializing RDF data see the Soprano.Parser and Soprano.Serializer classes. * * %Soprano comes with a builtin Server and Client implementations allowing to build remote repositories quickly. * Soprano.Client.SparqlModel provides a client to arbitrary SPARQL (SPARQL Protocol and RDF Query Language) * Http services. * * Quickstart * * Create an RDF Model: * *
* Soprano.Model* model = Soprano.createModel();
* \endcode
*
* Fill it with statements:
*
* \code
* model->addStatement( Soprano.Statement( QUrl( "http://mysite.org/data#A"), Soprano.Vocabulary.RDFS.label(), Soprano.LiteralValue( "A test resource" ) ) );
* \endcode
*
* Read the data back:
*
* \code
* Soprano.StatementIterator it = model->listStatements();
* while( it.next() ) {
* displayStatement( *it );
* }
* \endcode
*
* Query the data:
*
* \code
* Soprano.QueryResultIterator it = model->executeQuery( "select ?r where { ?r ?p ?o . }", Soprano.Query.QueryLanguageSparql );
* while( it.next() ) {
* displayResult( it.binding( "r" ) );
* }
* \endcode
*
* \section contents Contents
*
* The following sections contain further information on the usage of %Soprano.
*
* \li \ref soprano_storage
* \li \ref soprano_misc
* \li \ref soprano_error_handling
* \li \ref soprano_writing_plugins
* \li \ref Soprano.Server
* \li \ref Soprano.Client
* \li \ref soprano_devel_tools
Namespaces
