Virtuoso offers from Conductor UI an HTML based Wizard interface for dynamically generating & publishing RDF based Linked Data from ODBC or JDBC accessible relational data sources. Basically, a mechanism for building RDF based Linked Data views over relational data sources.

The proliferation of relational databases across enterprises and behind Web sites, makes them a vital data source for the burgeoning Linked Data Web. Thus, the process of publishing Linked Data from these sources needs to be as unobtrusive as possible. Naturally, a balance has to be struck between unobtrusive generation of Linked Data and traditional relational database management system (RDBMS) virtues such as:

  • Scalability

  • Security

  • Analytical Expressivity of SQL

  • Separation of Data Access and Data Storage via ODBC, JDBC, ADO.NET CLIs.

The following steps must be taken to publish RDF-based Linked Data:

  1. Identifying ODBC or JDBC data sources that host the data you seek to publish (assuming the data isn't Virtuoso RDBMS hosted -- in which case, skip ahead to step #3).

  2. Attach/Link TABLEs or VIEWs from the external data sources into Virtuoso via their Data Source Names (DSNs).

  3. Identify the internal or external TABLEs or VIEWs that hold the data you wish to publish.

  4. Configure Endpoints and Re-write Rules to disambiguate data object (resource) identity and description through HTTP-based content negotiation.

  5. Expose the Data Source Ontology and associated Instance Data in Linked Data form through those Endpoints and Re-write Rules.

These steps may be largely automated (the "One-Click" Deployment below), or performed manually ("Using the Conductor's HTML-based Wizard" further down).