Basic Customization > Windchill Customization Basics > The Windchill Development Environment > Directory Structure > The src Directory
  
The src Directory
In general, the src directory contains the source files needed for application development. The src directory can be expanded to show the following directories.
The src Directory
The wt and com\ptc directories contains the source files for the packages supplied by Windchill (only a subset of which are shown in this illustration).
In the wt directory and its package subdirectories, you will see the following kinds of files:
Localizable ResourceBundles (.rbInfo and .java) files, which contain customizable display text for EnumeratedTypes and business elements and UI strings.