//**
CERN Open Hardware Licence Version 2 - Weakly Reciprocal
https://spdx.org/licenses/CERN-OHL-W-2.0.json
https://www.ohwr.org/project/cernohl/wikis/Documents/CERN-OHL-version-2
**//

(( CERN Open Hardware Licence Version 2 - Weakly Reciprocal ))??

Preamble

CERN has developed this licence to promote collaboration among hardware
designers and to provide a legal tool which supports the freedom to use, study,
modify, share and distribute hardware designs and products based on those
designs. Version 2 of the CERN Open Hardware Licence comes in three variants:
CERN-OHL-P (permissive); and two reciprocal licences: this licence, CERN- OHL-W
(weakly reciprocal) and CERN-OHL-S (strongly reciprocal).

The CERN-OHL-W is copyright CERN 2020. Anyone is welcome to use it, in
unmodified form only.

Use of this Licence does not imply any endorsement by CERN of any Licensor or
their designs nor does it imply any involvement by CERN in their development.

   (( 1 ))??
   Definitions

      (( 1.1 ))??
      'Licence' means this CERN-OHL-W.

      (( 1.2 ))??
      'Compatible Licence' means

         (( a) ))??
         any earlier version of the CERN Open Hardware licence, or

         (( b) ))??
         any version of the CERN-OHL-S or the CERN-OHL-W, or

         (( c) ))??
         any licence which permits You to treat the Source to which it applies
         as licensed under CERN-OHL-S or CERN-OHL-W provided that on Conveyance
         of any such Source, or any associated Product You treat the Source in
         question as being licensed under CERN-OHL-S or CERN-OHL-W as
         appropriate.

      (( 1.3 ))??
      'Source' means information such as design materials or digital code which
      can be applied to Make or test a Product or to prepare a Product for use,
      Conveyance or sale, regardless of its medium or how it is expressed. It
      may include Notices.

      (( 1.4 ))??
      'Covered Source' means Source that is explicitly made available under this
      Licence.

      (( 1.5 ))??
      'Product' means any device, component, work or physical object, whether in
      finished or intermediate form, arising from the use, application or
      processing of Covered Source.

      (( 1.6 ))??
      'Make' means to create or configure something, whether by manufacture,
      assembly, compiling, loading or applying Covered Source or another Product
      or otherwise.

      (( 1.7 ))??
      'Available Component' means any part, sub-assembly, library or code
      which:

         (( a) ))??
         is licensed to You as Complete Source under a Compatible Licence; or

         (( b) ))??
         is available, at the time a Product or the Source containing it is
         first Conveyed, to You and any other prospective licensees

            (( i) ))??
            with sufficient rights and information (including any configuration
            and programming files and information about its characteristics and
            interfaces) to enable it either to be Made itself, or to be sourced
            and used to Make the Product; or

            (( ii) ))??
            as part of the normal distribution of a tool used to design or Make
            the Product.

      (( 1.8 ))??
      'External Material' means anything (including Source) which:

         (( a) ))??
         is only combined with Covered Source in such a way that it interfaces
         with the Covered Source using a documented interface which is described
         in the Covered Source; and

         (( b) ))??
         is not a derivative of or contains Covered Source, or, if it is, it is
         solely to the extent necessary to facilitate such interfacing.

      (( 1.9 ))??
      'Complete Source' means the set of all Source necessary to Make a Product,
      in the preferred form for making modifications, including necessary
      installation and interfacing information both for the Product, and for any
      included Available Components. If the format is proprietary, it must also
      be made available in a format (if the proprietary tool can create it)
      which is viewable with a tool available to potential licensees and
      licensed under a licence approved by the Free Software Foundation or the
      Open Source Initiative. Complete Source need not include the Source of any
      Available Component, provided that You include in the Complete Source
      sufficient information to enable a recipient to Make or source and use the
      Available Component to Make the Product.

      (( 1.10 ))??
      'Source Location' means a location where a Licensor has placed Covered
      Source, and which that Licensor reasonably believes will remain easily
      accessible for at least three years for anyone to obtain a digital copy.

      (( 1.11 ))??
      'Notice' means copyright, acknowledgement and trademark notices, Source
      Location references, modification notices (subsection 3.3(b) and all
      notices that refer to this Licence and to the disclaimer of warranties
      that are included in the Covered Source.

      (( 1.12 ))??
      'Licensee' or 'You' means any person exercising rights under this
      Licence.

      (( 1.13 ))??
      'Licensor' means a natural or legal person who creates or modifies Covered
      Source. A person may be a Licensee and a Licensor at the same time.

      (( 1.14 ))??
      'Convey' means to communicate to the public or distribute.

   (( 2 ))??
   Applicability

      (( 2.1 ))??
      This Licence governs the use, copying, modification, Conveying of Covered
      Source and Products, and the Making of Products. By exercising any right
      granted under this Licence, You irrevocably accept these terms and
      conditions.

      (( 2.2 ))??
      This Licence is granted by the Licensor directly to You, and shall apply
      worldwide and without limitation in time.

      (( 2.3 ))??
      You shall not attempt to restrict by contract or otherwise the rights
      granted under this Licence to other Licensees.

      (( 2.4 ))??
      This Licence is not intended to restrict fair use, fair dealing, or any
      other similar right.

   (( 3 ))??
   Copying, modifying and Conveying Covered Source

      (( 3.1 ))??
      You may copy and Convey verbatim copies of Covered Source, in any medium,
      provided You retain all Notices.

      (( 3.2 ))??
      You may modify Covered Source, other than Notices, provided that You
      irrevocably undertake to make that modified Covered Source available from
      a Source Location should You Convey a Product in circumstances where the
      recipient does not otherwise receive a copy of the modified Covered
      Source. In each case subsection 3.3 shall apply.

      You may only delete Notices if they are no longer applicable to the
      corresponding Covered Source as modified by You and You may add additional
      Notices applicable to Your modifications.

      (( 3.3 ))??
      You may Convey modified Covered Source (with the effect that You shall
      also become a Licensor) provided that You:

         (( a) ))??
         retain Notices as required in subsection 3.2;

         (( b) ))??
         add a Notice to the modified Covered Source stating that You have
         modified it, with the date and brief description of how You have
         modified it;

         (( c) ))??
         add a Source Location Notice for the modified Covered Source if You
         Convey in circumstances where the recipient does not otherwise receive
         a copy of the modified Covered Source; and

         (( d) ))??
         license the modified Covered Source under the terms and conditions of
         this Licence (or, as set out in subsection 8.3, a later version, if
         permitted by the licence of the original Covered Source). Such modified
         Covered Source must be licensed as a whole, but excluding Available
         Components contained in it or External Material to which it is
         interfaced, which remain licensed under their own applicable licences.

   (( 4 ))??
   Making and Conveying Products

      (( 4.1 ))??
      You may Make Products, and/or Convey them, provided that You either
      provide each recipient with a copy of the Complete Source or ensure that
      each recipient is notified of the Source Location of the Complete Source.
      That Complete Source includes Covered Source and You must accordingly
      satisfy Your obligations set out in subsection 3.3. If specified in a
      Notice, the Product must visibly and securely display the Source Location
      on it or its packaging or documentation in the manner specified in that
      Notice.

      (( 4.2 ))??
      Where You Convey a Product which incorporates External Material, the
      Complete Source for that Product which You are required to provide under
      subsection 4.1 need not include any Source for the External Material.

      (( 4.3 ))??
      You may license Products under terms of Your choice, provided that such
      terms do not restrict or attempt to restrict any recipients' rights under
      this Licence to the Covered Source.

   (( 5 ))??
   Research and Development

   You may Convey Covered Source, modified Covered Source or Products to a legal
   entity carrying out development, testing or quality assurance work on Your
   behalf provided that the work is performed on terms which prevent the entity
   from both using the Source or Products for its own internal purposes and
   Conveying the Source or Products or any modifications to them to any person
   other than You. Any modifications made by the entity shall be deemed to be
   made by You pursuant to subsection 3.2.

   (( 6 ))??
   DISCLAIMER AND LIABILITY

      (( 6.1 ))??
      DISCLAIMER OF WARRANTY -- The Covered Source and any Products are provided
      'as is' and any express or implied warranties, including, but not limited
      to, implied warranties of merchantability, of satisfactory quality,
      non-infringement of third party rights, and fitness for a particular
      purpose or use are disclaimed in respect of any Source or Product to the
      maximum extent permitted by law. The Licensor makes no representation that
      any Source or Product does not or will not infringe any patent, copyright,
      trade secret or other proprietary right. The entire risk as to the use,
      quality, and performance of any Source or Product shall be with You and
      not the Licensor. This disclaimer of warranty is an essential part of this
      Licence and a condition for the grant of any rights granted under this
      Licence.

      (( 6.2 ))??
      EXCLUSION AND LIMITATION OF LIABILITY -- The Licensor shall, to the
      maximum extent permitted by law, have no liability for direct, indirect,
      special, incidental, consequential, exemplary, punitive or other damages
      of any character including, without limitation, procurement of substitute
      goods or services, loss of use, data or profits, or business interruption,
      however caused and on any theory of contract, warranty, tort (including
      negligence), product liability or otherwise, arising in any way in
      relation to the Covered Source, modified Covered Source and/or the Making
      or Conveyance of a Product, even if advised of the possibility of such
      damages, and You shall hold the Licensor(s) free and harmless from any
      liability, costs, damages, fees and expenses, including claims by third
      parties, in relation to such use.

   (( 7 ))??
   Patents

      (( 7.1 ))??
      Subject to the terms and conditions of this Licence, each Licensor hereby
      grants to You a perpetual, worldwide, non-exclusive, no-charge,
      royalty-free, irrevocable (except as stated in subsections 7.2 and 8.4)
      patent license to Make, have Made, use, offer to sell, sell, import, and
      otherwise transfer the Covered Source and Products, where such licence
      applies only to those patent claims licensable by such Licensor that are
      necessarily infringed by exercising rights under the Covered Source as
      Conveyed by that Licensor.

      (( 7.2 ))??
      If You institute patent litigation against any entity (including a
      cross-claim or counterclaim in a lawsuit) alleging that the Covered Source
      or a Product constitutes direct or contributory patent infringement, or
      You seek any declaration that a patent licensed to You under this Licence
      is invalid or unenforceable then any rights granted to You under this
      Licence shall terminate as of the date such process is initiated.

   (( 8 ))??
   General

      (( 8.1 ))??
      If any provisions of this Licence are or subsequently become invalid or
      unenforceable for any reason, the remaining provisions shall remain
      effective.

      (( 8.2 ))??
      You shall not use any of the name (including acronyms and abbreviations),
      image, or logo by which the Licensor or CERN is known, except where needed
      to comply with section 3, or where the use is otherwise allowed by law.
      Any such permitted use shall be factual and shall not be made so as to
      suggest any kind of endorsement or implication of involvement by the
      Licensor or its personnel.

      (( 8.3 ))??
      CERN may publish updated versions and variants of this Licence which it
      considers to be in the spirit of this version, but may differ in detail to
      address new problems or concerns. New versions will be published with a
      unique version number and a variant identifier specifying the variant. If
      the Licensor has specified that a given variant applies to the Covered
      Source without specifying a version, You may treat that Covered Source as
      being released under any version of the CERN-OHL with that variant. If no
      variant is specified, the Covered Source shall be treated as being
      released under CERN-OHL-S. The Licensor may also specify that the Covered
      Source is subject to a specific version of the CERN-OHL or any later
      version in which case You may apply this or any later version of CERN-OHL
      with the same variant identifier published by CERN.

      You may treat Covered Source licensed under CERN-OHL-W as licensed under
      CERN-OHL-S if and only if all Available Components referenced in the
      Covered Source comply with the corresponding definition of Available
      Component for CERN-OHL-S.

      (( 8.4 ))??
      This Licence shall terminate with immediate effect if You fail to comply
      with any of its terms and conditions.

      (( 8.5 ))??
      However, if You cease all breaches of this Licence, then Your Licence from
      any Licensor is reinstated unless such Licensor has terminated this
      Licence by giving You, while You remain in breach, a notice specifying the
      breach and requiring You to cure it within 30 days, and You have failed to
      come into compliance in all material respects by the end of the 30 day
      period. Should You repeat the breach after receipt of a cure notice and
      subsequent reinstatement, this Licence will terminate immediately and
      permanently. Section 6 shall continue to apply after any termination.

      (( 8.6 ))??
      This Licence shall not be enforceable except by a Licensor acting as such,
      and third party beneficiary rights are specifically excluded.
