There is the IDL language desciption for the JavaCC parser generator at https://javacc.dev.java.net/files/documents/17/2916/IDLjj, inside JavaCC project The license is not stated explicitly (also not stated in the file header), but the license of the whole javacc project is BSD. Can we use that file in the planned IDL to Java compiler in GNU Classpath? This would save a for Vittorio Rigamonti a lot of time. Audrius.