Instruction: 1, Copy the the following source code piece, 2, Go to https://rdfa.info/play/ 3, Paste the source code 4, check the “Visualization” display 5. Switch from “Visualization” to “Raw Data” view Source code to be copied: Metadata etc.

Metadata etc.

> textbook 3rd. ed.
> textbook 2nd. ed.
> textbook 1st ed.
> Metadata Basics (tutorial)