Learn how to add RDFa metadata to DITA and DocBook documents, how to keep those documents valid, and what advantages this technique can bring to a DITA- or DocBook-based publishing system.
Twitter API libraries are available for most popular programming languages, and they're opening up new possibilities for publishing information. Explore a short Python script that tweets when the Dow Jones Industrial Average (or any stock or index you like) makes a big jump.
Twitter's API lets you read and write Twitter messages with minimal coding in nearly any programming language. In fact, you can use this Application Programming Interface without doing any programming.
Using the W3C OWL ontology standard lets you get more out of all kinds of data. Find out how this standard and some free software lets you query two databases as if they were one.