If set, and Hudson is set to poll for changes, Hudson will ignore any files and/or folders in this list when determining if a build needs to be triggered.

Each exclusion uses regular expression pattern matching, and must be separated by a new line.

    	 src/main/web/.*\.html
    	 src/main/web/.*\.jpeg
    	 src/main/web/.*\.gif

The example above illustrates that if only html/jpeg/gif files have been committed to the SCM a build will not occur.

More information on regular expressions can be found here.