from license.eml.txt:
-----
the VegBank schema and all aspects of the implementation except for the raw data
stared [stored] in the system are completely open to public use via GPLv2
license criteria [assuming http://www.gnu.org/licenses/gpl-2.0.txt]
-----
VegBank schema
Copyright (C) 2011  Ecological Society of America

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
[see ../GPL2.txt]