The files: libdwarf.h dwarf.h and all the .h and .c files in this implementation of libdwarf are copyrighted according to the file LIBDWARFCOPYRIGHT (which mentions the LGPL version 2.1). The full text of the LGPL 2.1 is provided in LGPL.txt The dwarf documentation: dwarf.v2.mm and its postscript form and its indexes are copyright Unix International (UI is now defunct). One presumes XOPEN owns the copyright now. In any case copying and revision without fee is permitted (see the copyright in the document). The libdwarf documentation: libdwarf2.1.mm is based on material submitted to the UI PLSIG as proposed interfaces for dwarf, but completely rewritten. Copyright ownership is therefore SGI (but see the document for details) and it seems clear that the intent was there was to be free copying with no fees. libdwarf2p.1.mm is documentation of a set of interfaces (not part of the UI PLSIG proposals) and the document was written from scratch at SGI. Copyright ownership is therefore SGI (but see the document for details) and it seems clear that the intent was there was to be free copying with no fees. $Source: /plroot/cmplrs.src/v7.4.5m/.RCS/PL/libdwarf/RCS/COPYING,v $ $Revision: 1.2 $ $Date: 2001/01/16 17:08:36 $