LICENSE

# CERN Open Hardware Licence v2 - Weakly Reciprocal

## Preamble

CERN has developed this licence to promote collaboration between 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); CERN-OHL-W (weakly reciprocal); and CERN-OHL-S (strongly reciprocal). This licence is CERN-OHL-W, the weakly reciprocal variant.

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:
   - CERN Open Hardware Licence version 1.1 or later, except CERN-OHL-S
   - GNU General Public License version 2.0 or later
   - GNU General Public License version 3.0 or later
   - GNU Lesser General Public License version 2.1 or later
   - GNU Lesser General Public License version 3.0 or later
   - Solderpad Hardware Licence version 0.51 or later
   - Any other licence that permits use, study, modification and distribution of Source and manufacture and distribution of Products under terms no more restrictive than this Licence

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:
   - is licensed to the Licensee under terms that are Compatible with this Licence, or
   - is not Covered Source but is commonly available at the time the Product is Made, without restriction on its use in products

1.8 **'External Source'** means any Source which is not Covered Source.

1.9 **'Convey'** means to transfer or distribute by any means, including but not limited to sale, lease, rental, loan, gift or transfer.

1.10 **'Notice'** means copyright, acknowledgement and trademark notices, references to the location of any Notices, modification notices referred to in section 3.3(b) and terms that are required to be included by any Compatible Licence under which any Covered Source is licensed.

1.11 **'Licensee'** or **'You'** means any person exercising rights under this Licence.

1.12 **'Licensor'** means any person who creates or modifies Covered Source and Conveys it under this Licence.

1.13 **'Contributor'** means any person who creates or modifies Covered Source that is subsequently Conveyed under this Licence by that person or another person.

1.14 **'Modification'** means anything added to or deleted from Covered Source or separate parts combined into one, or one separated into several, or any translation into another language or format.

1.15 **'Effective Date'** means the date on which the Licensee first exercises rights under this Licence.

## 2 Grant of Rights

2.1 **Copyright Licence**: Subject to sections 2.3 and 3, each Contributor grants You a worldwide, royalty-free, non-exclusive copyright licence to do everything restricted by copyright in respect of the Covered Source, including but not limited to:
   - using, copying, modifying, merging, publishing, distributing, sublicensing, and/or selling copies of the Covered Source

2.2 **Patent Licence**: Subject to sections 2.3 and 3, each Contributor grants You a worldwide, royalty-free, non-exclusive patent licence to do everything restricted by patent rights in respect of inventions arising from the making, having made, using, selling, offering for sale, importing or otherwise transferring of the Covered Source.

2.3 **Conditions**: The grants of rights under sections 2.1 and 2.2 are conditional on Your compliance with the conditions set out in section 3.

## 3 Conditions

3.1 **Conveying Covered Source**: If You Convey Covered Source, You must:
   - make this Licence available to the recipient
   - retain all Notices
   - inform the recipient of the source location if known

3.2 **Conveying Modified Covered Source**: If You Convey Modified Covered Source, You must:
   - license the Modified Covered Source under this Licence or a Compatible Licence
   - make the Source of the Modified Covered Source available to the recipients
   - document the modifications made

3.3 **Notice Requirements**: When Conveying Covered Source or Modified Covered Source, You must:
   - retain all copyright, patent, trademark and attribution notices
   - include a copy of or reference to this Licence
   - include a notice identifying the Modified Covered Source as modified

3.4 **Manufacture and Distribution of Products**: If You Manufacture or Distribute Products based on Covered Source, You must:
   - ensure that the Source of the Product is made available under this Licence or a Compatible Licence
   - comply with the requirements of section 3.3

## 4 Disclaimer

EXCEPT AS EXPRESSLY STATED IN THIS LICENCE, THE COVERED SOURCE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY ARISING FROM THE USE OF THE COVERED SOURCE.

## 5 Termination

Your rights under this Licence terminate automatically if You fail to comply with any of its terms. However, parties who have received Covered Source from You will not have their licences terminated as long as they remain in compliance.

## 6 General

6.1 This Licence is governed by the laws of Switzerland.

6.2 If any provision of this Licence is held invalid or unenforceable, the remaining provisions shall continue in full force and effect.

6.3 No waiver of any right under this Licence shall be effective unless in writing.

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**For the Open Cognitive Core Project (OCCP):**

Copyright (c) 2024 OCCP Contributors

This project is licensed under the CERN Open Hardware Licence v2 - Weakly Reciprocal (CERN-OHL-W).

See https://ohwr.org/license/CERN-OHL-W for the full licence text.