The Data Fundamental modules provide a solid overview over the workflow with data guiding you from what data is, to how to make your data tell a story. The courses listed below should be seen as a whole, a quick overview of the elements involved in working with data.
Interactive graphic by Rod Lucier. The entires are divided by type of visualization method, and rolling over each 'element' opens an example of the visualization method in question.
The Semantic Web has promised a new era of easier data integration. This article introduces core Semantic Web concepts and standards and explains how to expose an LDAP directory as a service that Semantic Web applications can consume using the open source