This software is made available under 2 possible licences:

   GNU LGPL, see COPYING.LIB

or 

   W3C IPR like licence see IPR

The (W3C) IPR seems more friendlier for commercial application.
Pick the one you prefer. Note also that though I don't try to
enforce it I prefer that improvement or bug fixes made to the
code be provided back, check the http://xmlsoft.org/ page for
details to contact the authors.

Daniel Veillard, representing the AUTHORS (see enclosed file)