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Servizi e applicazioni

Services and applications

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Services

The resulting dataset can be queried by selecting the RDF graph ''PRISMA data'' (http://www.ontologydesignpatterns.org/data/prisma/) on the dedicated SPARQL Endpoint. The ontology can also be queried by selecting the ''PRISMA ontology'' (http://www.ontologydesignpatterns.org/ont/prisma/) graph.

Queries can be made by editing the text area available into the interface for the SPARQL query language. The SPARQL endpoint is also accessible as a REST web service, whose synopsis is the following:

  • URL: http://wit.istc.cnr.it:8894/sparql
  • Method: GET
  • Parameters: query (mandatory)
  • MIME type supported output: text/html; text/rdf+n3; application/xml; application/json; application/rdf+xml.

Data are also accessible through content negotiation. The reference namespace for the ontology is: http://www.ontologydesignpatterns.org/ont/prisma/. The namespace associated with the data is: http://www.ontologydesignpatterns.org/data/prisma/.

These two namespaces allow content negotiation related to the ontology and the associated data. The negotiation can be done either via a web browser (in this case the MIME type of the output is always text/html), or by making HTTP REST requests to one of the two namespaces.

The synopsis of the REST requests to the web service associated with the ontology namespace is the following:

  • URL: http://www.ontologydesignpatterns.org/ont/prisma/
  • Method: GET
  • Parameters: ID of the ontology object (mandatory the PATH parameter)
  • MIME type supported output: text/html; text/rdf+n3; text/turtle; text/owl-functional; text/owl-manchester; application/owl+xml; application/rdf+xml; application/rdf+json.

The synopsis of the REST requests to the web service associated with the data namespace is the following:

  • URL: http://www.ontologydesignpatterns.org/data/prisma/
  • Method: GET
  • Parameters: ID of the data object (mandatory the PATH parameter)
  • MIME type supported output: text/html; text/rdf+n3; text/turtle; text/owl-functional; text/owl-manchester; application/owl+xml; application/rdf+xml; application/rdf+json.

Applications

  • Semantic Geo-Visualizer: visualization tool that shows geo-referenced objects in a map. Users can select a set of object classes and then a set of objects through two listboxes, and then selected objects are visualized on a Google map. Clicking on an object gives the related semantic information.
  • Urban faults: visualization tool that shows urban fault reporting and management data within an Exhibit interface, an open source-publishing framework for data-rich interactive web pages. The data collections can be searched and browsed through advanced text search and filtering functionalities using faceted browsing.