Hev is distributed under the following, BSD-compatible licenses.

All documentation is covered by this license, modelled after the
"Report on the Programming Language Haskell 98" license:

-----------------------------------------------------------------------------

  Copyright (c)2005-2016 Chris Pressey, Cat's Eye Technologies.
  All rights reserved.

  The authors intend this Report to belong to the entire Hev
  community, and so we grant permission to copy and distribute it for
  any purpose, provided that it is reproduced in its entirety,
  including this Notice.  Modified versions of this Report may also be
  copied and distributed for any purpose, provided that the modified
  version is clearly presented as such, and that it does not claim to
  be a definition of the Hev Programming Language.

-----------------------------------------------------------------------------

All source code for the reference implementation is covered by this license:

-----------------------------------------------------------------------------

Copyright (c)2005-2016 Chris Pressey, Cat's Eye Technologies.
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

 1. Redistributions of source code must retain the above copyright
    notices, this list of conditions and the following disclaimer.
 2. Redistributions in binary form must reproduce the above copyright
    notices, this list of conditions, and the following disclaimer in
    the documentation and/or other materials provided with the
    distribution.
 3. Neither the names of the copyright holders nor the names of their
    contributors may be used to endorse or promote products derived
    from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.