In general, it is a good idea to store the DITA files you create separately from DITA Open Toolkit, because:
A few simple entries in your Ant build scripts allow this separation.
Follow these steps to set up a directory environment and copy to the source files the garage and grocery shopping sample files that come with DITA Open Toolkit.
Your directory structures should look like the following figures:
For information about setting up Ant scripts to find your DITA source files in this new directory structure, see Processing (building) and publishing DITA documents.