The contents of "src/ucsc" fall under the license below. Note that the "src/lib", "src/inc" and "src/utils" refer to directories within the original Kent source tree. In rtracklayer, the files are all under "src/ucsc". All files are copyrighted, but license is hereby granted for personal, academic, and non-profit use. A license is also granted for the contents of the src/lib, src/inc and src/utils and python directories for commercial users.