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.
CERN Open Hardware Licence Version 2 – Weakly Reciprocal
Steward: