This projects provides the SPARQL enpoint "Virtuoso" for enhancing user experience with the ontologies and the controlled vocabularies of OntoPiA
PDND stays for "Piattaforma Digitale Nazionale Dati" (the Italian Digital Data Platform), previously known as Data & Analytics Framework (DAF).
You can find more informations about the PDND on the official Digital Transformation Team website.
Virtuoso is a high-performance object-relational SQL database. As a database, it provides transactions, a smart SQL compiler, powerful stored-procedure language with optional Java and .Net server-side hosting, hot backup, SQL-99 support and more. It has all major data-access interfaces, such as ODBC, JDBC, ADO .Net and OLE/DB.
Virtuoso has a built-in web server which can serve dynamic web pages written in Virtuoso's web language (VSP) as well as PHP, ASP .net and others. This same web server provides SOAP and REST access to Virtuoso stored procedures, supporting a broad set of WS protocols such as WS-Security, WS-Reliable Messaging and others. A BPEL4WS run time is also available as part of Virtuoso's SOA suite.
Virtuoso has a built-in WebDAV repository. This can host static and dynamic web content and optionally provides versioning. The WebDAV repository is tested to interoperate with WebDAV clients built into Windows XP, Mac OSX and others and makes Virtuoso a convenient and secure place for keeping one's files on the net. Further, Virtuoso provides automatic metadata extraction and full text searching for supported content types.
(credits: http://vos.openlinksw.com)
OntoPiA Virtuoso is a custom, containerized version of the standard version of Virtuoso used for OntoPiA, in the PDND project.
The project relies on Docker.
To build the containers type the following command in the terminal having the root of the project as base folder:
docker-compose buildTo run the containers type the following command in the terminal having the root of the project as base folder:
docker-compose upOnce the containers are up and assuming that localhost is the reference host, users can access the SPARQL endpoint at http://localhost:8890/sparql;
The following is an example of SPARQL SELECT query that returns all the classes defined in the ontology network of OntoPiA.
PREFIX owl: <http://www.w3.org/2002/07/owl#>
SELECT DISTINCT ?class
WHERE {
?class a owl:Class
}Contributions are welcome. Feel free to open issues and submit a pull request at any time, but please read our handbook first.
Copyright (c) 2019 Presidenza del Consiglio dei Ministri
This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License along with this program. If not, see https://www.gnu.org/licenses/.