SDMX

1. What is SDMX?
SDMX stands for Statistical Data and Metadata Exchange-the electronic exchange of statistical information. Its goal is to explore e-standards that could allow us to gain efficiency and avoid duplication of effort in our own work and possibly in the work of others in the field of statistical information.

help('$') in R

The R documentation is concise and rich. Documentation on $ is one example of those properties. The examples teach so much more than the few lines of space that they take up! The best practices advised and detailed explanations in the commentary make this literature required reading.