Architecture Council/Metadata File Naming Recommendations
Many Eclipse projects use the convention of starting metadata file and folder names with a dot ('.'). This convention comes from the Unix world, where dot-files are hidden by default. However on other platforms, dot-files cause problems. For example the Windows UI will not let you name a file that starts with a dot, and on Unix/Mac it is painful for an end-user to navigate through metadata files and directories that are hidden.