In order for the Semantic Web to become a reality and success, there needs to be data on the web published as Linked Data. However, data on the web is not a new thing. People have been publishing raw data for a long time as XML, CSV or even spreadsheets. Data can also be accessed through APIs.  But where does most of the data on the web come from? Relational Databases!

When most people think about “semantic” or “Semantic Web”-based software, they tend to think about applications that are quite explicit about their use of RDF, SKOS and OWL. While these types of applications are clearly becoming more popular, the vast majority of people have no clue why they should care about such things.