A project is a collection of files that are related to each other in some way you determine. For example, in the screenshot below, a project named Examples collects the files for various examples in separate example folders, each of which can be organized further into sub-folders. Within the Examples project, for instance, the OrgChart example folder is organized further into sub-folders for XML, XSL, and Schema files.
Projects thus enable you to gather together files that are used together and to access them quicker. Additionally, you can define schemas and XSLT files for individual folders, thus enabling the batch processing of files in a folder.