To view the sources for some of the examples in this course, download reuse_advanced_samples.zip now. Extract the contents and put them in a directory that you can access easily. If you have access to an output generator (usually the DITA Open Toolkit), you can use it to generate output and see these principles in action.
The lessons will instruct you on which files to use for the samples.
Create a local copy of each file to work in as you complete the lessons. That way, if you reach a point where your working file doesn’t match the examples, or is broken for any reason, you can make a fresh copy and resume your work or start over.
In the instructions and examples, we show you the DITA code for the sample files. Most DITA editors have auto-complete or other similar features to guide you through the process of adding elements (for example, if you type the opening tag of an element, most DITA editors will automatically add the closing tag for you). Therefore, you will probably not need to create every piece of code from scratch as you work.